Knee pain is one of the most common reasons people in Phoenix visit a family medicine practice — and one of the most frustrating conditions to treat when it becomes chronic. Whether you are dealing with the grinding ache of osteoarthritis, the sharp pain below your kneecap from years of running or jumping, or persistent inflammation that just will not settle down, knee pain has a way of affecting everything. Getting up from a chair. Climbing stairs. Keeping up with your kids. Going for a walk in the evening when the Phoenix heat finally breaks.
If you have already tried rest, physical therapy, anti-inflammatories, and maybe a cortisone shot or two, and you are still not where you want to be, Stemwave therapy may be worth a serious conversation. At Thunderbird Family Medicine, it is one of the tools we use for chronic musculoskeletal pain — and for several types of knee pain specifically, the clinical evidence behind it is genuinely compelling.
What Is Stemwave Therapy?
Stemwave is a form of acoustic wave therapy, more formally known as extracorporeal shockwave therapy or ESWT. It is non-invasive, FDA-listed, and works by delivering focused sound waves deep into damaged or inflamed tissue. Those waves create a controlled biological signal that stimulates blood flow, breaks down scar tissue, encourages collagen production, and jumpstarts the body’s own healing response in tissue that has become stuck in a chronic, non-healing state.
The treatment itself takes just a few minutes per session. There is no anesthesia, no recovery time, and no need to stop your daily activities afterward. Most treatment plans involve 8 to 12 sessions, and many patients begin noticing improvement within the first few visits — with results continuing to build over the following weeks as the underlying tissue heals.
What makes Stemwave particularly relevant for knee pain is the mechanism. Many chronic knee conditions involve tissue that is degenerating or inflamed at a biological level that standard anti-inflammatory treatments do not fully address. Stemwave works differently — instead of suppressing inflammation temporarily, it stimulates the cellular repair process that can lead to more durable improvement.
The Three Types of Knee Pain We Commonly Treat With Stemwave
Knee Osteoarthritis
Knee osteoarthritis — the gradual breakdown of cartilage in the joint — is one of the most prevalent chronic conditions in adults, and one of the leading causes of mobility limitations as people get older. In Phoenix, where year-round outdoor activity is the norm and an aging population is growing, it is something we see regularly at Thunderbird Family Medicine.
The research on ESWT for knee osteoarthritis is meaningful. A systematic review and meta-analysis found that ESWT is an effective treatment for improving both pain and functionality in patients with knee osteoarthritis in the short term, with few minor side effects. A 2025 clinical study tracking patients with early-to-mid-stage knee osteoarthritis found that pain scores dropped significantly across all post-treatment time points — with improvements in function and walking ability alongside the pain reduction. A separate systematic review of 24 articles covering 888 patients found that ESWT was effective for knee osteoarthritis compared with sham treatment, though it noted limitations in patients with the most severe end-stage disease.
That last point is worth being direct about. Stemwave is not going to rebuild cartilage that has already been lost. For patients with very severe, end-stage knee osteoarthritis who are already approaching surgery, it is unlikely to be the answer. But for patients with mild to moderate osteoarthritis who want to reduce pain, improve function, and delay or avoid surgical intervention, the evidence supports a real conversation about it.
Patellar Tendinopathy (Jumper’s Knee)
Patellar tendinopathy — commonly called jumper’s knee — is a chronic overuse injury involving the patellar tendon, which connects the kneecap to the shinbone. It is characterized by pain just below the kneecap, typically brought on by running, jumping, squatting, or climbing stairs, and it is one of the more frustrating knee conditions to treat because it tends to become chronic when the tendon tissue degenerates and loses its ability to heal properly on its own.
Patellar tendinopathy affects anywhere from 14% to 45% of athletes in sports involving repetitive jumping, but it is far from exclusive to elite athletes — anyone who increases their activity level quickly, works on their feet, or regularly runs on hard surfaces can develop it.
For this condition, a systematic review and meta-analysis published in 2026 found that ESWT represents a viable non-invasive treatment option for individuals not responding to conservative care, with improvements in both pain and function. A 2025 retrospective study following runners treated with ESWT for patellar and quadriceps tendinopathy found significant functional improvements — particularly notable because most participants in that study had symptoms for a median of 13 months and had already gone through physical therapy without adequate improvement. The fact that ESWT produced results in a population that had failed standard care is clinically meaningful.
A combined treatment approach using both ESWT and other conservative interventions also showed that combining treatments can provide earlier pain relief than either approach alone, with no adverse effects reported.
Runner’s Knee and IT Band Issues
Runner’s knee — patellofemoral pain syndrome — refers to pain around or behind the kneecap that worsens with activity, prolonged sitting, and going up or down stairs. In Phoenix, where running trails and warm weather keep people active year-round, it is a common complaint. The pain comes from irritation of the cartilage under the kneecap or surrounding soft tissue, often driven by muscle imbalances, overuse, or biomechanical factors.
For this category of knee pain, Stemwave works by targeting the inflamed soft tissue structures around the kneecap, stimulating circulation and tissue repair in areas that standard rest and anti-inflammatories may not fully resolve. While the evidence base specifically for patellofemoral pain and ESWT is less developed than for osteoarthritis or patellar tendinopathy, the same underlying biological mechanism that makes it effective for other chronic knee conditions applies here — and it remains a reasonable option for patients who have worked through standard conservative care without sufficient improvement.
Who Is a Good Candidate?
Not every knee pain patient is a Stemwave candidate, and we will be straightforward with you about that from the first conversation. Stemwave works best for chronic musculoskeletal conditions where tissue healing has stalled. It is generally not the first step for an acute injury — if you twisted your knee last week, the starting point is still rest, ice, and evaluation.
Good candidates typically include patients who have been dealing with knee pain for at least six to eight weeks without adequate improvement from conservative measures, patients who have had cortisone injections with only temporary relief, patients who want to avoid repeated steroid use or are concerned about its long-term effects on tissue integrity, patients who need to stay active for work or daily life and cannot afford extended downtime, and patients who are looking for a non-surgical option before committing to a procedure.
Stemwave may not be appropriate if you have an active infection or tumor in the area, if you are pregnant, if you are on blood thinners that would contraindicate the therapy, or if imaging has revealed a structural problem that requires surgical correction. A thorough evaluation at your appointment will clarify where you fall.
What to Expect at Thunderbird Family Medicine
Stemwave sessions for knee pain are efficient and straightforward. The applicator is placed directly over the area of pain or dysfunction, and focused acoustic waves are delivered to the target tissue. Sessions typically take 3 to 8 minutes, and you can return to normal activity immediately afterward.
Results are not instant — the healing process Stemwave initiates takes time to unfold — but many patients begin noticing meaningful improvement within a few weeks, with continued progress over the following months. That progression mirrors how tissue regeneration actually works biologically. We will track your response and adjust the plan accordingly.
Phoenix’s active lifestyle, warm-weather outdoor culture, and growing population of adults managing chronic joint pain make this a relevant option for a lot of people in the Valley. If your knee pain has been limiting your life and you want to know whether Stemwave is a fit for your situation, the conversation starts at your appointment.
Schedule an appointment at Thunderbird Family Medicine and let’s talk through what’s going on with your knee — and what we can do about it.
This post is for educational purposes only and does not constitute medical advice. Please consult your provider before starting any new treatment.