Anterior knee pain (runner’s knee): what it means and where it comes from

Stairs and squats load the joint between the kneecap and the thigh bone more than walking on flat ground does.^[3] That is why they tend to hurt first.

For patellofemoral pain, the main guideline points to an active approach. Education, adjusting activity and exercise for the hips and knees are the core.^[1] Adjusting activity means changing what the knee is asked to do. It does not mean stopping for good. The guideline favours hip and knee strengthening over knee exercises alone (level B evidence).^[1]

This evidence is about patellofemoral pain. It does not speak for every cause in the table above. A tendon problem or bursitis has its own care.

The guideline also notes that symptoms can recur and persist for years.^[1] That is worth knowing early. It is why steady, progressed strengthening matters more than a quick fix.

Surgery is a different conversation. It is considered for specific kneecap tracking or instability problems, which have their own pages. It is not the starting point for ordinary front-of-knee pain.

Runners often ask whether running causes arthritis. The article Does running cause knee arthritis? sets out the evidence.

An assessment brings together your history, an examination and imaging. Imaging is used only when it can answer a useful question. A scan alone never selects treatment.^[4]

A cost estimate for surgery can be given only after a consultation and assessment, once a surgical plan has been developed. A surgical estimate separates surgeon, anaesthetist, hospital or facility, implant and consumable costs, and the MOH publishes national fee benchmarks for common procedures. For how costs, MediSave and insurance work in Singapore, see Costs, insurance and MediSave, explained.

Benefits, pre-authorisation, letters of guarantee, panel rules and reimbursement depend on your individual policy and the insurer’s decision. Neither panel status nor co-management guarantees coverage, approval or cashless treatment.

The clinic team can assist with claim paperwork, including personal accident, hospitalisation or travel claims from other insurers, but cannot promise the outcome.

To book, use the appointment section at the end of this page.

Arrange a consultation: the appointment section is further down this page.

1. Willy RW, Hoglund LT, Barton CJ, et al. Patellofemoral Pain: Clinical Practice Guidelines Linked to the International Classification of Functioning, Disability and Health. J Orthop Sports Phys Ther. 2019;49(9):CPG1-CPG95. PMID 31475628. DOI 10.2519/jospt.2019.0302
2. NHS. Knee pain. https://www.nhs.uk/symptoms/knee-pain/
3. Leo S. Knee pain climbing stairs? (Here’s what your body is telling you). OrthoKinetics video, 7 August 2025. https://orthokinetics.sg/videos/knee-pain-climbing-stairs-heres-what-your-body-is-telling-you/
4. OrthoKinetics. Orthopaedic knee care in Singapore: assessment and treatment options. https://orthokinetics.sg/knee-specialist-singapore/

Reading about a problem is a starting point. An assessment brings together the history, an examination where needed and any useful tests, and helps you and your clinician decide what to do next. How much physical examination is needed is a matter of clinical judgement. It may be limited when pain makes an examination unreliable, or when imaging clearly shows a problem that matches the symptoms, such as a fracture seen on an X-ray or an MRI scan that clearly shows an injury consistent with the symptoms. The Singapore Medical Council and the UK General Medical Council both allow remote medical consultations, where a physical examination is not possible, with safeguards: the doctor must be clear about the limits of an opinion formed without an examination, and whether an in-person examination is needed, or referral to other services, is left to the clinical judgement of the attending doctor.

Signs that need urgent help

Some symptoms should not wait for a routine appointment. Each item below says where to go.

After an injury

• The kneecap has slipped out of place and is still out, or the knee looks deformed. Go to an emergency department. If the kneecap went back into place by itself, arrange an early assessment.
• The leg looks twisted or bent, a bone is showing, there is a deep cut, or the foot or leg turns cold, pale, numb, blue or white. Go to an emergency department or call 995.
• You cannot lift your leg up with the knee kept straight, and you may feel a gap just above or just below the kneecap. Arrange an urgent same-day assessment.

At any time

• The knee is stuck and will not straighten, or it is very painful and you cannot move it or put weight on it. Arrange an urgent same-day assessment.
• The knee is suddenly very painful, hot, red and swollen, especially with a fever or feeling generally unwell. Go to an emergency department or call 995.
• One calf or thigh is newly painful and swollen. Arrange an urgent same-day assessment. If you also feel short of breath or have chest pain, call 995.

After knee surgery

• The operated knee becomes more painful, swollen or red, a wound is leaking, or you develop a fever. Contact your surgical team straight away. If you cannot reach them the same day, go to an emergency department. If you feel very unwell, go to an emergency department. If you are short of breath or have chest pain, call 995.

If you are admitted by the doctor at the urgent care centre of one of these private hospitals, the Parkway Pantai hospitals (Mount Elizabeth Orchard, Mount Elizabeth Novena, Gleneagles and Parkway East), Farrer Park Hospital and Thomson Medical Centre, you may ask for Dr Sean Leo to be your attending orthopaedic surgeon. If you are instead discharged and referred for orthopaedic follow-up, you may contact the clinic to arrange an appointment. Both are subject to the hospital’s admission processes and to Dr Leo’s availability.