Patellar Tendonitis
Patellar tendonitis is a common cause of knee pain, especially in people who play sports that involve jumping or running. It affects the tendon that connects your kneecap (patella) to your shinbone.
What is patellar tendonitis?
Patellar tendonitis, also known as patellar tendinopathy or “jumper’s knee”, is a condition where the patellar tendon becomes irritated and damaged. This tendon plays an important role in straightening your knee and supporting movements like walking, running, and jumping.
Over time, repeated strain can lead to small areas of damage within the tendon. Rather than being a short-term inflammation, it’s often a longer-term condition involving tendon wear and reduced healing.
It’s most common in:
athletes who play sports such as basketball, football, or volleyball
people who run frequently
those who suddenly increase their activity levels
While the condition can be painful and frustrating, most cases improve with the right treatment and support. Our orthopaedic consultants diagnose and treat patellar tendonitis in our specialist Orthopaedics centre, using evidence-based approaches tailored to your needs.
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We offer appointments to paediatric patients aged 4+. For full information on our paediatrics service, please visit our main Paediatric Orthopaedics page.
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Symptoms usually develop gradually rather than suddenly. Pain is often the first sign, especially during or after activity.
Common symptoms include:
pain just below the kneecap
tenderness when pressing on the tendon
pain during activities like jumping, running, or climbing stairs
stiffness in the knee, especially in the morning or after rest
weakness in the leg or reduced ability to perform sports
worsening pain over time if not treated
In the early stages, you may only notice discomfort after exercise. As the condition progresses, pain may occur during activity and even at rest.
Patellar tendonitis is usually caused by repeated stress on the tendon. This can lead to small tears that the body struggles to repair fully over time.
Common causes include:
repetitive jumping or running
sudden increase in training intensity or frequency
poor technique during sports or exercise
tight muscles in the legs, particularly the quadriceps or hamstrings
muscle imbalances or weakness
Risk factors
Some factors can increase your risk of developing patellar tendonitis:
high-impact sports participation
poor footwear or training surfaces
reduced flexibility
previous knee injuries
being overweight, which places more strain on the knee
At your initial consultation, your consultant will ask about your symptoms, activity levels, and medical history. They’ll also examine your knee to check for pain, swelling and movement.
In many cases, a diagnosis can be made based on your symptoms and physical examination. However, tests may be recommended to confirm the diagnosis or rule out other conditions.
These may include:
ultrasound scan – to assess tendon structure and damage
MRI scan – to provide detailed images of the tendon and surrounding tissues
X-ray – to rule out bone-related problems
Your consultant may still recommend imaging even if the diagnosis seems clear, to assess the severity and guide treatment.
While it's not always possible to prevent patellar tendonitis, there are steps you can take to reduce your risk or prevent it from returning.
These include:
increasing activity levels gradually rather than suddenly
warming up properly before exercise
strengthening the muscles around the knee
improving flexibility with regular stretching
wearing appropriate footwear for your sport
allowing time for rest and recovery between training sessions
If you notice early symptoms, reducing activity and seeking advice can help prevent the condition from worsening.
Patellar tendonitis is usually manageable, but it can lead to ongoing problems if left untreated.
Possible complications include:
chronic knee pain that affects daily activities
reduced strength and mobility
increased risk of tendon rupture (rare but serious)
long-term damage to the tendon
Most complications develop gradually and can often be avoided with early treatment. With the right care, many people make a good recovery.
Treatment focuses on reducing pain, supporting healing and helping you return to normal activity safely. Your treatment plan will depend on how severe your symptoms are and how long you’ve had them.
Treatment options may include:
activity modification – reducing or avoiding activities that trigger pain
physiotherapy – exercises to strengthen and stretch the muscles around the knee
pain relief medication – such as paracetamol or nonsteroidal anti-inflammatory drugs (NSAIDs)
ice therapy – applying ice packs to reduce pain after activity
supportive braces or straps – to reduce strain on the tendon
shockwave therapy – a non-invasive treatment to stimulate healing in the tendon
injections – such as steroids or other targeted treatments, used in selected cases
surgery – rarely needed, but may be considered if symptoms persist despite other treatments
Most people improve with non-surgical treatments, especially when they follow a structured physiotherapy programme. Recovery can take several weeks to months, depending on the severity.
At Welbeck, our orthopaedic specialists and sports doctors are experts in their field and are dedicated to providing world-class care to every patient.
With access to colleagues across other specialties, our consultants are also able to refer within the Welbeck ecosystem if required to ensure you receive the treatment you need as quickly as possible, all under one roof.
All appointments, testing, treatment, and follow-up appointments take place within our state-of-the-art facilities, enabling us to deliver accurate diagnostics and advanced treatments.
Your health is important to us, so we strive to offer same-day appointments whenever possible.
Our consultants are recognised by the major health insurance companies. If you have private health insurance, your treatment at Welbeck can begin once you have obtained authorisation. We also provide care to self-paying patients. Learn more about the different payment options at Welbeck.
Get in touch today to book an appointment.
Our specialists
Mr Simon Owen-JohnstoneConsultant Orthopaedic Surgeon
Mr Kostas TsitskarisConsultant Orthopaedic Surgeon (Hip & Knee)
Mr R. Lloyd WilliamsConsultant Orthopaedic Surgeon (Foot & Ankle)
Dr James ThingConsultant in Sports & Musculoskeletal Medicine
Mr Francesc MalageladaConsultant Orthopaedic Surgeon (Foot & Ankle)
Mr Matthew SolanConsultant Orthopaedic Surgeon (Heel & Ankle)
Mr Deepu SethiConsultant Orthopaedic Surgeon (Knee)
Dr Lorenzo MasciConsultant in Sports & Musculoskeletal Medicine
Mr Joshua LeeConsultant Orthopaedic Surgeon (Hip & Knee)
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Frequently asked questions
Recovery time varies depending on the severity of the condition and how early treatment begins. Mild cases may improve within a few weeks, while more persistent cases can take several months. Following a structured rehabilitation plan can help speed up recovery.
You may be able to continue some forms of exercise, but it’s important to avoid activities that worsen your pain. Low-impact exercises, such as swimming or cycling, are often recommended while the tendon heals.
No, patellar tendonitis involves irritation and small areas of damage within the tendon. A tendon tear is more severe and involves a partial or complete rupture. Tears are less common but may require more intensive treatment, including surgery in some cases.
You should consider seeing a specialist if your knee pain lasts more than a few weeks, worsens over time, or affects your daily activities or sports performance. Early assessment can help prevent the condition from worsening.