Learn about PRP therapy for plantar fasciitis and Achilles tendon problems. Discover promising treatment options.

Abstract

Hello, I’m Dr. Alex Jimenez, and I’d like to share a revolutionary perspective on a common and often debilitating condition: plantar fasciitis. For too long, the standard approach has focused on directly treating the plantar fascia in the foot, often with painful injections and limited success. This educational post will take you on a journey to understand why this approach is often flawed. Drawing from the latest findings and collaborative research, we will explore the true root cause of most chronic plantar fasciitis cases: Achilles tendinopathy. I will detail a modern, evidence-based protocol that targets the Achilles tendon and gastrocnemius muscle complex, offering a more effective, less invasive, and longer-lasting solution. We will delve into the underlying physiology, the specific injection techniques involved, and how this fits within a comprehensive, integrative care model. At our practice, Injury Medical Clinic, we combine these advanced regenerative procedures with a multidisciplinary framework that includes specialized chiropractic care, medical oversight, and functional medicine to address the whole person, not just the symptom. This post aims to empower both patients and practitioners with a deeper understanding of this condition and a new path toward healing.

Our Collaborative Care Model: Integrating Medicine and Chiropractic

Before we dive into the specifics of this innovative treatment, I want to explain the unique structure of our practice. My name is Dr. Alex Jimenez, and my credentials include DC, APRN, FNP-BC, CFMP, IFMCP, ATN, and CCST. My journey in healthcare has been driven by a passion for understanding the intricate connections within the human body and finding the most effective, evidence-based paths to healing.

At Injury Medical Clinic PA (also known as Mission Plaza Injury Medical Clinic) here in El Paso, Texas, we operate on a multidisciplinary and integrative model. Central to this model is my collaboration with Dr. Maria Guadalupe Cardenas, MD. Dr. Cardenas is Board Certified in Internal Medicine (NPI #1164426749, Texas MD License #J2933) and brings over 40 years of invaluable experience as an internist. She serves as our esteemed Medical Director and Collaborative Physician.

This partnership between a Doctor of Chiropractic (DC) and a Medical Doctor (MD) is foundational to our approach. It allows us to offer a truly comprehensive spectrum of care. While I focus on the biomechanical, neurological, and functional aspects through integrative chiropractic care and functional medicine, Dr. Cardenas provides essential medical oversight, diagnostic expertise, and management of the broader aspects of a patient’s health. This is particularly crucial in personal injury cases and complex chronic conditions where a patient’s needs span multiple disciplines.

Our team synergistically blends:

• Medical Oversight (Dr. Cardenas): Providing primary medical assessment, managing comorbidities, and ensuring all treatments are medically sound and appropriate for the patient’s overall health status.
• Integrative Chiropractic Care (Dr. Jimenez): Focusing on spinal and extremity adjustments, soft tissue mobilization, and restoring proper biomechanics, which are often at the root of musculoskeletal pain syndromes.
• Functional Medicine: Investigating the underlying causes of dysfunction, from metabolic and nutritional imbalances to systemic inflammation, which can perpetuate conditions like tendinopathies.
• Regenerative Medicine: Utilizing advanced procedures like the one described in this post to stimulate the body’s natural healing processes.
• Rehabilitation and Personal Injury Care: Designing customized programs to restore function, strength, and mobility, especially following an injury.

This integrated system ensures that a patient with, for example, chronic heel pain isn’t just receiving an injection. They are also being assessed for biomechanical faults in their gait, spinal misalignments that affect their posture and weight distribution, and systemic inflammatory triggers that could be hindering tissue repair. Dr. Cardenas ensures that any underlying medical conditions, like diabetes or vascular issues, are accounted for in the treatment plan. This holistic, team-based approach is the cornerstone of our philosophy and is critical to achieving successful, long-term outcomes for our patients.

Unveiling the True Culprit: The Achilles Tendon-Gastrocnemius Complex

For years, patients have come to my clinic with the same frustrating story. They have been diagnosed with plantar fasciitis, a condition characterized by sharp, stabbing pain in the heel, especially with the first steps in the morning. They have tried everything: stretching, night splints, expensive orthotics, and, most dreaded of all, painful corticosteroid injections directly into the sole of their foot. While some find temporary relief, the pain almost always returns, sometimes worse than before.

This cycle of treatment and recurrence led my colleagues and me to ask a critical question: What if we are targeting the wrong structure? What if the plantar fascia is the victim, not the villain?

The Birth of a New Protocol

This question sparked a pivotal conversation I had about eight years ago with Dr. Roman, a brilliant orthopedic surgeon and faculty member at the University of Nevada Medical School. We were discussing the frustrating limitations of conventional plantar fasciitis treatments. He had just spent his day attempting a fat pad replacement surgery for a patient whose heel pad had atrophied after years of repeated corticosteroid injections—a condition known as fat pad syndrome. This is a devastating complication because once that protective fatty tissue is gone, it doesn’t come back, leaving the patient with agonizing bone-on-ground pain with every step.

He expressed his frustration, saying, “We have to stop sticking needles in the bottom of our people’s feet.” That evening, fueled by a shared desire for a better way and a couple of Moscow Mules, we mapped out a new protocol on a few bar napkins. The logic was simple yet profound: the chronic pain of plantar fasciitis wasn’t an issue originating in the fascia itself. Instead, it was a secondary consequence of chronic tightness and dysfunction in the posterior chain, specifically the gastrocnemius muscle and its connection to the Achilles tendon.

We theorized that if we could resolve the tendinopathy and tightness in the Achilles, we could relieve the relentless tension on the plantar fascia, giving it the mechanical peace it needed to heal finally. We both started implementing this protocol in our respective practices—he from an orthopedic surgery perspective, me from an integrative chiropractic and functional medicine standpoint. The results were nothing short of remarkable. Dr. Roman went on to conduct formal clinical trials, starting with a published N of one study (a case study on a single patient), which gradually helped the technique gain traction.

From my own clinical observations over nearly a decade, I can tell you this: the protocol works, and it works incredibly well. It has fundamentally changed how I treat heel pain in my practice.

The Biomechanical Connection: Why the Achilles is the Key

To understand why this approach is so effective, we need to look at the anatomy and biomechanics of the lower leg and foot.

• The Posterior Chain: The gastrocnemius (the large, two-headed calf muscle) and the soleus (a smaller muscle underneath it) merge to form the Achilles tendon. This is the thickest, strongest tendon in the human body.
• The Insertion Point: The Achilles tendon inserts onto the back of the heel bone (the calcaneus).
• The Continuous Fascial Line: The plantar fascia is a thick band of connective tissue that originates from the bottom of that same heel bone and fans out to the toes. It acts like a bowstring, supporting the arch of the foot.

Anatomically and functionally, the gastrocnemius, Achilles tendon, and plantar fascia are part of a continuous line of tension. Think of it like a rope and pulley system. The calf muscle is the engine, the Achilles is the rope, and the plantar fascia is an anchor point at the other end.

When the calf muscles are chronically tight, and the Achilles tendon develops tendinosis—a state of degenerative, non-inflammatory thickening and disorganization of the tendon fibers—it places a constant, unyielding tensile force on the calcaneus. This is the core of the problem.

The Vicious Cycle of Nighttime Tightening and Morning Tearing

Here is the physiological sequence of events that leads to the classic morning heel pain:

1. Chronic Achilles Tendinosis: The tendon becomes stiff, dysfunctional, and shortened due to overuse, poor biomechanics, or systemic inflammation.
2. Nighttime Plantarflexion: When you lie down to sleep, your foot naturally relaxes into a pointed position (plantarflexion). In this position, the already-tight Achilles-gastrocnemius complex becomes even shorter, holding the foot in this state for hours.
3. Fascial Contraction: The plantar fascia, being connected to this system, is also held in a shortened, contracted state all night long.
4. The First Step: In the morning, you stand up and place your full body weight onto your foot. This action forces the foot into dorsiflexion (flexing the foot up), abruptly and violently stretching the shortened, stiff, and cold plantar fascia.
5. Micro-Tearing: This sudden, forceful stretch causes thousands of tiny tears (micro-tears) in the fascial tissue, particularly at its insertion point on the heel bone. This is what causes that excruciating, sharp pain.
6. Inflammatory Response and Pain: The body initiates an acute inflammatory response to these new micro-injuries, leading to pain with every subsequent step. As you walk around, the tissues warm up and stretch out, so the pain often subsides, only for the entire cycle to repeat itself the next night.

This is not a primary “itis” (inflammation) of the fascia. It is a repetitive strain injury perpetuated by a dysfunctional Achilles tendon. The plantar fascia is simply the structure that tears because it’s at the end of the kinetic chain. By treating the Achilles tendon, we interrupt this vicious cycle at its source. We release the tension, which prevents the nighttime shortening and eliminates the morning micro-trauma. This gives the plantar fascia a chance to heal on its own.

The Regenerative Injection Protocol: A Step-by-Step Guide

The treatment protocol we developed is a regenerative injection technique designed to target two key areas: the body of the Achilles tendon and its insertion point on the calcaneus. The goal is to stimulate a healing response, break down dysfunctional tendinosis tissue, and restore normal function.

For this demonstration, we are using a simple solution, but in my clinical practice, I often use more advanced orthobiologics like Platelet-Rich Plasma (PRP) or prolotherapy solutions. The principles and landmarks, however, remain the same.

Step 1: Targeting the Mid-Substance of the Achilles Tendon

The first target is the main body of the tendon, specifically the area of the bifurcation, where the gastrocnemius muscle fibers transition into the tendon itself. This is often a key area of fibrotic and dysfunctional tissue.

Identifying the Injection Point

1. Patient Positioning: The patient lies face down on the treatment table with their feet hanging off the edge. This position relaxes the calf and Achilles tendon.
2. Palpation Technique: To find the precise entry point, I have the patient gently push their foot against my leg. This contraction makes the Achilles tendon pop out, making it easy to trace. I then run my thumb up the tendon until I feel a distinct split or fork in the tissue. This is the bifurcation. It feels like the solid, rope-like tendon gives way to the two softer bellies of the gastrocnemius muscle.
3. Marking the Spot: This bifurcation is our entry point. It’s a strategic location that allows us to treat a significant portion of the dysfunctional tendon from a single entry.

The Injection Technique

The technique here is crucial for ensuring the solution is delivered into the tendon, not just around it. Tendons are dense and fibrous, and you can feel a distinct change in tissue resistance when the needle enters it.

1. Bevel Up: We always ensure the bevel (the slanted tip) of the needle is facing up. This allows the needle to pass through tissue planes more smoothly.
2. Initial Entry: Using a syringe (for this demonstration, we have 5 cc of solution), the needle is inserted at the marked bifurcation point. The initial insertion goes just deep enough to break through the subcutaneous tissue (the layer just under the skin). I typically use an inch-and-a-half needle in my office for better reach, but a one-inch needle can also work. We insert the needle about halfway in.
3. Changing the Angle (The “Lean” ): This is the most important part of the technique. After the initial perpendicular entry, the needle is angled downward, almost parallel to the skin, and advanced into the length of the tendon. By not going deep initially and then changing the angle, we avoid being too superficial (sub-Q) and ensure the needle travels within the tendon fibers.
4. Feeling the Tissue Change: As the needle advances, I can feel a distinct change in resistance. The dense, gritty, and sometimes “crunchy” feel of the tendinotic tissue is unmistakable. This tactile feedback confirms that the needle is in the correct location. I ask the patient if they feel any pain, but often, with proper technique and a local anesthetic in the solution, it’s more of a pressure sensation.
5. Injecting the Solution: Once I am confident the needle is within the tendon, I slowly inject the solution (in this case, about 1-2.5 cc’s, depending on the total volume available). The injection should be done slowly to allow the fluid to dissect through the dense fascial planes of the tendon. This is a form of hydrodissection, where the fluid itself helps to break up adhesions and scar tissue.

This first injection addresses the tendinosis in the main body of the Achilles, which is the primary driver of the mechanical tension.

Step 2: Treating the Tendon Insertion (Enthesis)

The second part of the protocol targets the enthesis, which is the point where the Achilles tendon attaches to the calcaneus (heel bone). This is another common site of pain, degeneration, and micro-tearing, a condition known as enthesopathy.

Identifying the Injection Points

1. Palpation: With the patient’s foot relaxed, I palpate along the bottom of the Achilles tendon where it fans out and attaches to the bone. I’m feeling for the “ropy” edges of the tendon attachment.
2. Finding Maximum Tenderness: I press on both the medial (inner) and lateral (outer) sides of the insertion. I ask the patient, “Where is it more tender?” In most cases, the medial side is significantly more tender. This is because gait abnormalities and foot pronation often put more strain on the inner aspect of the heel. The point of maximum tenderness is our target. This is a key principle in regenerative injections: treat the area that is the most painful and dysfunctional.

The Injection Technique

1. Angled Entry: We approach this area from the side, angling the needle directly toward the point of maximum tenderness on the bone. The goal is to get the tip of the needle right at the tendon-bone interface.
2. Depth: The needle is advanced about halfway, aiming to gently contact the bone (peppering the periosteum, or bone surface, can also stimulate a healing response).
3. Aspiration (A Critical Safety Step): Before injecting, it is absolutely imperative to aspirate. This means pulling back on the syringe plunger to create negative pressure. If the needle tip is inside a blood vessel, blood will flash back into the hub of the syringe.

• Why is this so important? The solutions used in prolotherapy and even some PRP preparations contain a local anesthetic like lidocaine. If you accidentally inject lidocaine directly into a blood vessel (intravascular injection), it can travel rapidly to the heart and brain, causing serious systemic toxicity, including seizures, cardiac arrhythmias, or even cardiac arrest. If you see a “flash” of blood, you must immediately withdraw the needle, clear the blood from the hub, and find a new injection site. Safety is always the paramount concern.

• Injection: Once I have aspirated and confirmed I am not in a vessel, I inject a small amount of the solution (e.g., 0.5 cc) directly onto the enthesis. If treating both sides, I would repeat the process on the lateral side as well.

This two-step process—addressing both the mid-substance of the tendon and its insertion point—provides a comprehensive treatment for the entire dysfunctional Achilles complex.

Understanding the Healing Mechanisms: PRP vs. Prolotherapy

The effectiveness of this protocol is significantly enhanced by the type of solution injected. While even saline can provide some benefit through hydrodissection, using regenerative solutions like PRP or prolotherapy initiates a powerful biological healing cascade.

Platelet-Rich Plasma (PRP)

PRP is my preferred solution for this protocol due to its efficiency and potency.

• What is it? PRP is a concentration of platelets derived from the patient’s own blood. We draw a small amount of blood, spin it in a centrifuge to separate the components, and harvest the platelet-rich layer of the plasma.
• How does it work? Platelets are the body’s first responders to injury. They are packed with hundreds of bioactive proteins called growth factors. When we inject this high concentration of platelets into the damaged tendon, we are essentially tricking the body into thinking a new, acute injury has occurred. The platelets degranulate, releasing a powerful cocktail of growth factors, including:

• Platelet-Derived Growth Factor (PDGF): Stimulates cell replication and angiogenesis (new blood vessel formation).
• Transforming Growth Factor-Beta (TGF-?): Promotes the synthesis of the extracellular matrix, which is the scaffolding for new tissue.
• Vascular Endothelial Growth Factor (VEGF): A potent stimulator of new blood vessel growth, which is critical for bringing oxygen and nutrients to the chronically ischemic (low blood flow) tendinotic tissue.
• Fibroblast Growth Factor (FGF): Stimulates the proliferation of fibroblasts, the cells responsible for producing collagen, the main building block of tendons.

• The Clinical Advantage: PRP creates a robust and accelerated healing response. In my experience, many patients achieve significant and lasting relief after just one or two PRP treatments. The best place to inject PRP is always at the point of maximum tenderness, as this is where the pathology is most concentrated.

Prolotherapy

Prolotherapy (short for “proliferative therapy”) is another excellent regenerative option.

• What is it? Prolotherapy involves injecting a mild irritant solution—most commonly a dextrose (sugar) solution mixed with a local anesthetic—into a damaged ligament or tendon.
• How does it work? The dextrose solution acts as an osmotic irritant, which creates a localized, controlled inflammatory response. This is key because chronic tendinosis is a degenerative, not an inflammatory, state. The tissue is stuck and unable to heal. Prolotherapy re-initiates the acute inflammatory phase of healing (the first phase: inflammation, proliferation, remodeling). This new inflammation attracts the body’s repair cells (macrophages, fibroblasts) to the area to clean up damaged tissue and lay down new, healthy collagen fibers.
• The Clinical Advantage and Disadvantage: Prolotherapy is very effective and much more cost-effective than PRP. However, the healing response it generates is less intense than that of PRP. Therefore, it typically requires a series of treatments to achieve the desired outcome. A typical prolotherapy protocol might involve weekly injections for four weeks, followed by treatments every other week for a couple more sessions. While it takes longer, the result is often just as successful: a stronger, healthier, and less painful tendon.

A colleague shared a personal story during a training session that perfectly illustrates the problem with the old method. He had been performing prolotherapy on himself, injecting directly into his plantar fascia. He said, “It just sucks. Now you have this new injury from the needle in my fascia… I got this pokin’, damn feeling in my foot.” His experience highlights the iatrogenic trauma (injury from treatment) we cause by needling this sensitive, vulnerable, and poorly vascularized tissue on the sole. By moving the treatment to the Achilles, we avoid this and target the actual source of the problem.

The Role of Integrative Chiropractic Care in Recovery and Prevention

The regenerative injection protocol is a powerful tool for breaking the cycle of pain and stimulating tissue repair. However, for true, long-term resolution, we must address the underlying biomechanical and functional issues that contributed to the development of Achilles tendinopathy in the first place. This is where integrative chiropractic care becomes an indispensable part of the treatment plan.

As a Doctor of Chiropractic, I view the body as an interconnected system. The pain in your heel is not an isolated event; it is a symptom of a larger pattern of dysfunction.

Post-Injection Rehabilitation and Chiropractic Adjustments

Immediately following the injection procedure, we must manage the acute healing phase and then guide the body back to optimal function.

• Initial Immobilization: For the first three days post-injection, I often place the patient in a walking boot. This serves two purposes:

1. 1. It protects the newly treated tendon from excessive strain, allowing the initial inflammatory and proliferative phases of healing to proceed undisturbed.
   2. It prevents the foot from dropping into plantarflexion during rest, acting like a daytime night splint and breaking the cycle of nighttime tightening.

1. 1. Therapeutic Stretching: After these initial three days, the patient can begin a gentle and progressive calf stretching program. This is now therapeutic rather than damaging. Because we have initiated a healing process in the tendon, stretching helps to guide the new collagen fibers to align properly along the lines of stress, resulting in a strong, flexible, and functional tendon rather than a disorganized scar.
   2. Chiropractic Spinal and Extremity Adjustments: This is the cornerstone of my contribution to the patient’s recovery. I assess the patient’s entire kinetic chain, from the spine down to the toes.

• Lumbosacral and Pelvic Alignment: Misalignments in the lower back (lumbar spine) and pelvis can alter the nerve supply to the muscles of the leg. More importantly, they create imbalances in gait and posture. A rotated pelvis, for example, can cause a functional leg length discrepancy, forcing one leg to bear more weight and predisposing the calf and Achilles on that side to overuse and injury. By delivering specific chiropractic adjustments to the lumbosacral spine and sacroiliac joints, I can restore proper pelvic alignment and neurological function, balancing the load between the legs.
• Foot and Ankle Biomechanics: I perform a detailed assessment of the foot and ankle complex. Many patients with Achilles tendinopathy have underlying subtalar joint dysfunction or excessive pronation (flat feet). These issues alter the mechanics of walking and running, placing abnormal torsional and tensile stress on the Achilles tendon. Specific chiropractic adjustments to the bones of the foot (e.g., the talus, navicular, and cuboid) can restore normal joint mobility and improve the foot’s ability to absorb shock. This is a critical step in preventing recurrence.

Functional Medicine and Systemic Inflammation

As a Certified Functional Medicine Practitioner, I also look beyond the musculoskeletal system. Chronic tendinopathy is often fueled by underlying systemic inflammation. A pro-inflammatory diet (high in sugar, processed foods, and industrial seed oils), hidden gut infections, food sensitivities, or nutritional deficiencies can impair the body’s ability to repair tissues.

Part of my comprehensive evaluation involves assessing these factors and creating a personalized plan that may include:

• An anti-inflammatory diet plan.
• Targeted nutritional supplements (e.g., Vitamin C, zinc, collagen peptides) to support connective tissue health.
• Strategies to improve gut health and reduce systemic inflammatory load.

By integrating regenerative injections with chiropractic care, targeted rehabilitation, and a functional medicine approach, we are not just treating the pain in the heel. We are restoring the health of the tendon, correcting the biomechanical faults that caused the problem, and optimizing the body’s systemic environment to support lasting healing and prevent future injury. This is the essence of true integrative healthcare.

References

• Jimenez, A. (n.d.). Clinical Observations. Chiropractic Scientist.
• Jimenez, A. (n.d.). Professional Profile. LinkedIn.

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