What Is Knee Tendonitis?
Knee tendonitis often refers to patellar tendonitis: inflammation, and in persistent cases degeneration, of the tendon linking the kneecap to the shin bone, the tendon that lets you straighten your knee. It’s often called jumper’s knee because jumping and landing are common triggers; it affects runners and anyone who repeatedly loads the knee.
The term patellar tendinopathy describes the same condition once it turns chronic: the tendon tissue starts breaking down and losing its normal structure, which is why knee tendonitis treatment aimed only at cutting inflammation can fall short in longer-standing cases.
Patellar tendon pain typically sits below the kneecap and worsens with activities that load the tendon directly, jumping, squatting, or going down stairs.
Recognising Knee Tendonitis
Common signs include:
Pain and tenderness below the kneecap, on the patellar tendon
Swelling around the tendon that links the kneecap to shinbone
Pain when bending or straightening the knee during activities
Discomfort that worsens with jumping, running or long sitting
Knee tendonitis tends to progress in stages, moving from pain only after activity, through pain during and after activity, to pain that lingers and starts limiting performance even at rest. Knowing which stage you’re in matters because it shapes how aggressively knee tendonitis treatment needs to respond.
Knee Tendonitis Treatment Options
Most cases of knee tendonitis are managed without surgery, especially when caught in the earlier stages.
Jumper’s knee treatment typically begins with adjusting activity and physiotherapy, targeting flexibility and strength in the quadriceps and hamstrings, since imbalances here place extra load on the tendon. Knee tendonitis treatment more broadly may also involve anti-inflammatory medication, and in some cases dry needling or extracorporeal shockwave therapy, depending on how the tendon has responded to initial care.
Treatment for jumper’s knee that isn’t getting better with these measures calls for reassessment rather than simply continuing the same approach for longer. A patellar tendon injury that keeps coming back, or one where pain lasts well beyond the expected timeframe, often needs a closer look at underlying biomechanics, footwear, training load, or structural factors like flat feet.
Knee Tendonitis Surgery
Patellar tendonitis surgery, sometimes needed for jumper’s knee surgery in the most advanced or unresponsive cases, is kept for tendons that haven’t improved despite a genuine trial of non-surgical knee tendonitis treatment, or where imaging shows notable structural damage.
Arthroscopic debridement is the standard approach: small incisions, a camera, and purpose-built instruments to clear damaged tissue from the tendon. In some cases, a small portion of the kneecap itself may also need attention if it’s contributing to the problem.
Surgery here is genuinely a last resort, not a shortcut around rehabilitation; most patients who reach this point have already tried extended conservative treatment first.
What Happens in Knee Tendonitis Surgery?
Before surgery
Your surgeon confirms the diagnosis and rules out other causes of anterior knee pain, often supported by ultrasound or MRI to gauge how much tendon damage there is.
During surgery
Depending on the findings, the surgeon may:
- Remove damaged tendon tissue (debridement)
- Address any bony irregularity contributing to the problem
- Assess the tendon's structural integrity directly
After surgery
Recovery involves a structured period of protected activity followed by gradual rehabilitation, guided by how the tendon is healing rather than a fixed timeline.
Recovery After Knee Tendonitis Treatment
Recovery timelines vary significantly depending on whether treatment is surgical or non-surgical, and how advanced the condition was before treatment started. Many patients with mild to moderate knee tendonitis see improvement over the first few months with steady rest and strengthening work.
Continuing physiotherapy even after symptoms settle helps lower the risk of recurrence, since the underlying loading pattern that caused the problem doesn’t just disappear on its own. Return to sport should be gradual and guided by your surgeon or physiotherapist, not resumed the moment pain eases.
Don’t power through knee pain that keeps coming back
Don’t wait it out
Who May Need Knee Tendonitis Treatment?
Knee tendonitis affects people of all ages, though it’s more common in those who load the knee repeatedly:
- Runners with sudden increases in training volume or running intensity
- Athletes in jumping or pivoting sports like basketball and volleyball
- Those with flat feet or other structural issues altering knee loading
- Older adults, whose tendons naturally become less elastic as they age
- Anyone with persistent pain, swelling, or stiffness below the kneecap
Each of these has its own dedicated page covering diagnosis and treatment in depth; this page focuses on how OrthofootMD approaches sports injury as a whole.
About Your Orthopaedic Specialist
Dr. Gowreeson Thevendran
MBChB (Bristol) · MRCS.Ed · Dip. Sports Med.Ed · FRCS.Ed (Trauma & Ortho.) · FAMS (Singapore)
Dr Gowreeson Thevendran is an orthopaedic surgeon in Singapore who specialises in lower limb orthopaedic conditions, including patellar tendon injuries, trauma, and fracture surgery. He undertook fellowship training in sports surgery at Chelsea & Westminster Hospital and in complex trauma and deformity correction at the Royal Liverpool University Hospital, and he continues to serve as a visiting consultant at Tan Tock Seng Hospital.
Questions patients ask
FAQs
Can I Keep Playing Sport With Knee Tendonitis?
Continuing to play through pain risks making the condition worse. Athletic activity should be scaled back and only resumed under guidance from a treating physician, with warm-ups, rest periods, and modified training in the meantime.
What Causes Knee Tendonitis?
Common causes include repetitive high-impact activity, sudden jumps in training load, structural factors like flat feet or weak gluteal muscles, and age-related loss of tendon elasticity.
What Happens If Knee Tendonitis Is Left Untreated?
Untreated knee tendonitis tends to get worse, with the tendon potentially weakening and degenerating over time, raising the risk of tearing and long-term knee dysfunction.
What Are the Risks of Knee Tendonitis Surgery?
Risks can include infection, bleeding, nerve irritation, and in rare cases further weakening of the tendon. Stiffness and reduced range of motion are also possible during recovery.
Does Insurance and MediSave Cover Knee Tendonitis Treatment?
Coverage depends on the specific treatment and your policy. Patients should confirm MediSave eligibility and insurance coverage directly with the clinic and their insurer.
What Is the Difference Between Knee Tendonitis and Patellar Tendinopathy?
They describe the same condition at different stages. Tendonitis refers to inflammation of the patellar tendon. Tendinopathy is the term used once the problem becomes chronic, when the tendon tissue itself starts breaking down and losing its normal structure. This is why treatment for longer-standing cases looks beyond reducing inflammation.
How Long Does Knee Tendonitis Take to Heal?
Healing time depends on how advanced the condition was when treatment began. Many patients with mild to moderate knee tendonitis see improvement over the first few months with steady rest and strengthening work. Continuing physiotherapy after symptoms settle helps lower the risk of the problem returning.
Does Jumper's Knee Need Surgery?
Surgery is uncommon. Jumper’s knee is usually managed with activity changes and physiotherapy, and sometimes with medication, dry needling or shockwave therapy. Surgery is kept for tendons that have not improved despite a genuine trial of these treatments, or where imaging shows notable structural damage.
Is Knee Pain Below Your Kneecap Holding You Back?
If pain from jumping, running, or squatting keeps returning, an orthopaedic assessment can help identify the cause and go over your treatment options.