Fix Your Knee Pain

Knee pain

Also called Patellofemoral pain, Runner's knee, Kneecap pain, Knee pain when squatting

3 min plan58 min with every studyUpdated Sep 28, 2026

Who it's forA man aged 18 to 45 whose knee hurts when he squats, runs or climbs stairs.

When to see a doctor

Call 911 now: after an injury, a bone showing, heavy bleeding, or a leg you cannot move. Also calf pain and swelling with breathlessness or chest pain: it can be a clot in the lungs.
The ER today: after an injury, a knee that has changed shape, swells up very fast, or went with a pop or snap. Do not drive yourself.
Urgent care now: a knee that is very painful, locks, gives way, cannot bear weight, or is badly swollen.
Urgent care the same day: a hot, red, swollen knee with a fever or feeling unwell. It can be a joint infection.
Urgent care or your doctor today: sore, swollen joints with pain when you pee, a discharge, or sore red eyes. Also throbbing pain and swelling in one calf.
Your doctor or a physical therapist: knee pain not improving within a few weeks, or pain in the calf, numbness or tingling below the sore knee.
A knee specialist: a knee that keeps giving way after a twist, catches or locks, or a kneecap that has dislocated more than once.
Both are free and open 24 hours.

I am not a doctor. This is not medical advice. This is self-education. Every dose on this page is the one a trial or a label used, quoted from it. It is not a prescription. Talk to a physician who has your history before any medicine or procedure. A knee out of place after an injury: call 911. A knee that locks, gives way or will not take weight: urgent care.