Prolotherapy

The Science

What Is Prolotherapy?

Prolotherapy, short for proliferative therapy, is a dextrose-based injection therapy that stimulates the body's own repair cascade to strengthen weakened ligaments, tendons, and joints. Ligaments and tendons have a naturally poor blood supply, so the growth factors and repair cells that coordinate healing cannot reach injured tissue in sufficient concentrations, leaving many injuries incompletely healed.

Ligaments and tendons are the connective tissues that hold joints together and transmit force between muscle and bone. When these structures are sprained, strained, overstretched, or chronically damaged, they often fail to heal completely. This is due to the innate anatomy of these structures; they are made up of dense fibrous collagen built for strength. Because of this, they naturally have a poor blood supply. Without adequate blood flow, the growth factors and repair cells that coordinate healing cannot reach the injured tissue in sufficient concentrations.

When a ligament is sprained or a tendon is strained, the body does its best to heal that trauma, but often the outcome is a poorly healing structure with scar tissue instead of healthy collagen. This results in chronic joint instability, persistent aching, and unfortunately, a cycle of re-injury that doesn't always resolve with conservative measures. The use of anti-inflammatory medications like ibuprofen and NSAIDs or cortisone injections tend to worsen the tissue integrity by preventing proper healing while masking the pain symptoms, further perpetuating the problem.

Prolotherapy interrupts this cycle by introducing a precisely injected solution directly into the damaged ligament or tendon attachment point — the enthesis. The solution, typically concentrated dextrose (sugar water), acts as a mild irritant at the injection site. This controlled micro-irritation triggers the body's natural healing cascade, which over time can lead to tightening and strengthening of weakened ligaments, leading to a resolution of ligament laxity, joint instability, and chronic pain.

The dextrose solution used in prolotherapy is natural, biocompatible, and has an excellent safety record spanning more than five decades of clinical use, with some mentions of use dating back nearly 90 years. It carries none of the tissue-degrading effects associated with corticosteroid injections.

The Process

What Does The Prolotherapy Process Look Like?

Prolotherapy treatment begins with a thorough assessment of the interconnected structures involved, guided by a physical exam, functional movement assessment, and imaging review. Then, the dextrose solution is prepared and injected precisely under ultrasound guidance. Multiple injection sites per session are common, as most instability patterns involve several overlapping structures.

Comprehensive Evaluation

Dr. Bhandari begins with a detailed physical exam, a functional movement assessment, and a thorough review of your imaging to identify every pain generator involved. Joint instability and ligament laxity is often multi-site, therefore treating a single structure in isolation rarely resolves the full picture.

Solution Preparation

A pharmaceutical-grade dextrose solution prepared, often mixed with a local anesthetic to minimize discomfort during the injection. The dextrose concentration and total volume are tailored to the target tissue type and the degree of injury or laxity being addressed.

Precise Injection

Ultrasound guidance allows Dr. Bhandari to visualize the ligament or tendon entheses in real time. Dextrose is injected precisely at the fibro-osseous junction and sites of ligament damage. Multiple injection sites per session are common, as most instability patterns involve several overlapping structures.

Follow-up Treatment

Prolotherapy often involves multiple treatments, typically spaced 4–6 weeks apart, allowing for further healing and tissue maturation to progress before the next treatment.

Prolotherapy dextrose solution preparation at Dr. Ashok Bhandari's regenerative orthopedic clinic, Bellevue

The Mechanism

How Does Prolotherapy Work?

When connective tissue heals poorly following injury, it is usually because the tissue has a poor natural blood supply, the initial inflammatory signal was too brief, too weak, or was prematurely interrupted by anti-inflammatory measures (NSAIDs, cortisone, or even ice), or activity was resumed too quickly post-injury. Prolotherapy restarts that signal at the exact site of structural weakness.

The dextrose acts as a mild irritant at the injection site, creating a focal stimulus that the local tissue environment registers as an injury requiring repair. A local inflammatory healing cascade is triggered that the body responds to by increasing blood flow to the area and signalling the mechanisms of repair. Growth factors, macrophages, and fibroblasts are recruited to the treatment site. Macrophages clear debris and release signaling proteins while fibroblasts synthesize new collagen fibers at the ligament or tendon injury site, filling in the micro-tears and stretched regions that previously never fully resolved. Collagen remodeling progresses over weeks as the newly deposited fibers mature, align with lines of mechanical stress, and integrate into the existing connective tissue architecture.

The result is tighter, more stable connective tissue. Ligaments are more effectively able to resist stretch and support the joint as needed, while providing crucial proprioceptive feedback to the brain; tendons are better able to transfer forces from muscles to the bone, improving movement strength. The cycle of chronic pain and inflammation is broken and the root cause of pain is finally addressed.

Educational Video

Understanding Prolotherapy

Coming Soon: Dr. Bhandari Talks about Prolotherapy.

Dr. Bhandari regularly publishes educational content on regenerative injection therapies — including procedure walkthroughs, patient outcome discussions, and clinical insights on the evidence behind each modality.

Clinical Applications

What Can Prolotherapy Address?

Prolotherapy is most appropriate for chronic pain rooted in ligament laxity, tendon weakness, or joint instability. This includes acute injuries, chronic pain, and even underlying hypermobility. The following represent conditions most frequently seen in Dr. Bhandari's practice where prolotherapy has demonstrated meaningful clinical benefit.

Joints

Knee osteoarthritis and instability Hip joint laxity and osteoarthritis Shoulder instability (glenohumeral laxity) Ankle instability and recurrent sprains Sacroiliac joint dysfunction Elbow instability Wrist and thumb joint laxity

Ligaments

ACL, MCL, and LCL sprains and laxity UCL and RCL sprains and laxity (elbow) ATFL and CFL sprains and laxity (ankle) Cervical ligament sprains and instability Sacroiliac ligament laxity Lumbar facet ligament laxity

Tendons

Patellar tears and tendinopathy Achilles tears and tendinopathy Rotator cuff tears and tendinopathy Lateral epicondylar tendinopathy (tennis elbow) Medial epicondylar tendinopathy (golfer's elbow) Peroneal tendinopathy

Spine

Cervical ligament laxity (whiplash-related) Lumbar facet joint pain Low back pain (facet and SI joint origin) Coccydynia

Other

Post-surgical ligament and tendon weakness Hypermobility syndromes (including EDS) Chronic joint instability following failed conservative care

Not sure if your condition qualifies? Dr. Bhandari evaluates each patient's case individually. A summary of your history and a thorough physical exam can often be enough to determine whether prolotherapy may be the right treatment for you. Contact us to discuss your specific situation.

The Difference in Approach

Why Does the Quality of Prolotherapy Vary Between Providers?

Prolotherapy is a well-established therapy, but its outcomes depend heavily on the quality of the clinical assessment preceding it, the precision of delivery, and the individualization of the protocol. An appropriate injection to the wrong location or a confined treatment area can produce limited results or lead to additional treatments.

Comprehensive Assessment Before Treatment

Every patient undergoes a thorough clinical evaluation before a treatment plan is proposed: detailed history, physical examination, and review of existing and new imaging. An accurate diagnosis of all pain generators and pain triggers is crucial. Joint instability is rarely isolated to a single ligament laxity or single enthesitis. Since pain can be multifactorial and not always due to what appears "damaged" on imaging, all structures generating the pain must be identified before any regenerative therapy is selected.

Individualized & Integrated Regenerative Treatments

Dextrose concentration, injection volume, the number of sites treated per session, and the interval between sessions are all individualized based on the tissue type, severity of laxity, and how the patient responds to each treatment. When an enhanced regenerative signal is warranted, prolotherapy can be combined with PRP, PPP, or other regenerative therapies to amplify the healing response.

Ultrasound Guidance

Real-time ultrasound imaging confirms needle placement before dextrose is introduced. Dr. Bhandari visualizes the structure being treated, and more specifically, the exact location within the structure that needs treatment, before injecting. Palpation-guided prolotherapy, while practiced widely, does not offer the same level of accuracy in treatment, introducing unnecessary risk and a meaningful limitation on overall effectiveness.

Whole-Body Context

Joint instability and ligament laxity can have multiple causes, and rarely is chronic pain due to a sole structure. Evaluating for underlying hypermobility, nutritional status, hormone balance, biomechanics, and related joints/structures all plays into a full assessment. Dr. Bhandari addresses these systemic contributors alongside the injections, rather than simply treating the enthesis in isolation.

Companion Therapies

Prolotherapy is frequently combined with other orthobiologic therapies, depending on the individual clinical picture. Prolotherapy is often most effective as part of a broader regenerative strategy, combined with PRP, shockwave therapy, and perineural injection therapy. Comprehensive treatment of an injury provides the best chance at a meaningful positive response.

Common Questions

Frequently Asked Questions

How is prolotherapy different from a cortisone or steroid injection?

Cortisone injections suppress the local inflammatory response to reduce pain. The use of anti-inflammatory medications and cortisone tends to worsen tissue integrity over time by preventing proper healing while masking the pain. With prolotherapy, a dextrose solution is used to stimulate the body's own repair mechanisms by initiating an acute inflammatory response followed by the anti-inflammatory healing cascade. The goal is for injured tissues to truly heal and resolve the cause of pain, rather than simply masking the symptom.

Am I a candidate for prolotherapy?

Prolotherapy is appropriate for conditions involving weakened, lax, or chronically injured ligaments, tendons, and joints. Because pain can originate from multiple structures simultaneously, correct identification of the pain-generating structures is essential before treatment. A comprehensive physical examination and imaging review are the foundation of this assessment. The best way to determine candidacy is through a real conversation with Dr. Bhandari about your history, imaging, and clinical picture.

How many prolotherapy sessions are typically needed?

The number of treatments depends on the severity and chronicity of the injury, the structures involved, and the individual's healing response. Historically, palpation-guided prolotherapy commonly involved 3–6 treatment sessions. With image-guided prolotherapy, meaningful results are often achievable with fewer treatments because the injection is delivered more precisely to the structures identified as pain generators. The specific plan for your case will be discussed at the consultation.

Can prolotherapy treat osteoarthritis?

Prolotherapy has a strong clinical application in osteoarthritis, particularly where ligament laxity and joint instability contribute to joint degeneration. Evidence supports prolotherapy for knee, hip, and other joint osteoarthritis, with many patients experiencing meaningful reductions in pain and improvement in function. Whether prolotherapy is the right approach for your specific case and degree of arthritis is determined during the assessment.

Can prolotherapy be combined with other treatments?

Prolotherapy is frequently combined with other orthobiologic therapies. Extracorporeal shockwave therapy directly supports ligament and tendon remodeling and is routinely used alongside prolotherapy. For patients where neurogenic inflammation is also a contributor to pain, Perineural Injection Therapy may be integrated. For more advanced tissue damage, Platelet-Rich Plasma (PRP) can be used where prolotherapy alone may be insufficient. The combination is determined individually based on the clinical picture.

Take the Next Step

Ready to Explore Prolotherapy?

If you've been told your ligaments are permanently damaged, or that you'll just have to live with the pain, prolotherapy may offer a different answer. Schedule a consultation with Dr. Bhandari to find out whether you're a candidate and how he would approach your case.

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