Pain at the Front of the Knee
Anterior knee pain located around, behind, or below the kneecap, aggravated by stairs, squatting, or running.
On this page
What does this symptom mean?
Front of knee pain typically arises from the patellofemoral joint (where the kneecap glides on the thigh bone) or the tendons surrounding it (patellar or quadriceps tendons). It is frequently triggered by activities that load the kneecap, such as climbing stairs, running, squatting, or sitting for long periods. Wording is cautious: anterior knee pain has several distinct causes, and a biomechanical assessment is key.
Anatomical Overview
Important — Educational Information Only
Pain location alone cannot determine the cause of knee symptoms. This map provides educational information about anatomical structures and possible associations. It is not a diagnostic tool. A clinical examination by a qualified specialist is required to determine the cause of your knee pain.
Knee Pain Location — Educational Guide
Select a view and tap a numbered hotspot on the photograph to view associated educational information.
Tap or click a numbered hotspot
Select a numbered hotspot on the Front (Anterior) photograph or use the Prev/Next buttons below to browse.
View all regions as text (accessible fallback)
Front (Anterior) View
Around the Kneecap (Anterior)
Pain around or behind the kneecap (patella). Often worsened by stairs, squatting, or prolonged sitting.
Outer Joint Line (Lateral)
Pain along the outer joint line. Often related to sports injuries, pivoting movements, or lateral compartment problems.
Inner Joint Line (Medial)
Pain along the inner side of the knee joint line. The medial compartment bears the majority of weight-bearing load.
Back (Posterior) View
Behind the Knee (Posterior)
Pain, swelling, or fullness in the hollow behind the knee (popliteal fossa). Often secondary to an internal joint problem.
Inner (Medial) View
Medial (Inner) Compartment
Pain along the inner side of the knee. The medial compartment is the most commonly affected by arthritis and meniscal tears.
Outer (Lateral) View
Lateral (Outer) Compartment
Pain along the outer knee compartment. Lateral problems are less common but frequently sports-related.
Symptom-to-Recovery Pathway
Standard Patient Journey Pathway
How the symptom may present
Patients describe this symptom in various ways depending on its trigger and severity:
Possible causes
The possible causes listed below are not exhaustive. One symptom can have several underlying causes, and a clinical assessment is typically required to confirm a diagnosis.
Patellofemoral Pain
Pain located at the front of the knee around or behind the kneecap, often aggravated by climbing stairs or prolonged sitting.
Knee Tendinopathy
Irritation, inflammation, or micro-tearing of the tendons surrounding the knee joint, such as the patellar or quadriceps tendon.
Knee Arthritis
Degeneration of the knee joint cartilage leading to progressive pain, stiffness, and restricted mobility.
When to seek urgent advice
Certain symptoms (red flags) indicate the need for prompt clinical evaluation. Seek immediate assessment if you experience:
- The kneecap feels like it is slipping out of its groove
- Front of knee pain is accompanied by joint swelling or warmth
- You cannot straighten the leg or lift it against gravity
How the symptom is assessed
Your consultant will carry out a thorough assessment to understand the triggers, location, and functional impact of the symptom.
- Detailed history of activity levels, training loads, and symptom triggers
- Physical examination of patellar tracking, alignment, and local tenderness
- Assessment of quadriceps, gluteal, and calf muscle strength
- Evaluation of foot posture and lower limb biomechanics
Investigations that may be considered
Depending on the findings of your clinical assessment, your consultant may recommend imaging scans:
Standard Skyline X-rays
assess patellar tracking and alignment
MRI scan
check cartilage thickness behind the patella or assess tendon structure
What may help initially
For non-urgent presentations, simple self-care and load management can help settle symptoms:
- Relative rest: temporarily reducing activities that trigger the pain (e.g. running or stairs)
- Applying ice packs to the front of the knee for 15 minutes after activity
- Structured quadriceps and hip abductor strengthening exercises
- Using supportive patellar taping or bracing during exercises
When to arrange a professional consultation
You should arrange a specialist consultation if you experience any of the following:
- Pain persists despite modifying your activities and rest
- The pain restricts your daily walking, work, or sports participation
- You experience a sensation of the kneecap shifting or dislocating
Frequently Asked Questions
- Knee Pain Conditions, Causes, Symptoms, Treatments (hss.edu)
- Anterior Knee Pain - A Guide and Differential Diagnosis (acep.org)
- Narrative: Review of Anterior Knee Pain Differential Diagnosis ... (pmc.ncbi.nlm.nih.gov)
- Pain in the front of the knee: Causes, symptoms, and treatment (medicalnewstoday.com)
Would you like an individual knee assessment?
A consultation can help clarify the possible cause of your symptoms and discuss appropriate next steps.
Face-to-face appointments are arranged through the reception team at the chosen clinic. Video consultations use Google Calendar where available.
Next Step: Explore Possible Conditions
Similar symptoms can occur with several different knee conditions. Learn about common diagnoses, how they are assessed, and how force transmission affects joint health.
Get notified about new content on Pain at the Front of the Knee
We'll only email you about updates on this specific topic — unsubscribe anytime.
Medical Disclaimer
This website provides educational and general information about knee symptoms, conditions, and treatments. The content is for informational purposes only and does not constitute medical advice, diagnosis, or a treatment plan. It should not be used as a substitute for a professional consultation, examination, or clinical decision-making by a qualified orthopaedic specialist.
If you are experiencing symptoms or are concerned about a knee problem, please arrange a clinical consultation. If you have urgent symptoms, severe pain, or are unable to put weight on your leg, please read our urgent advice guidance or contact emergency services immediately (dial 999 or NHS 111).