Real doctor here. Free medical advise is worth what you pay for it! NOTHING. See a reputable orthopedic surgeon and get a real workup. Knee pain is a non-diagnostic symptom. Some of the suggestions here could be dangerous as none of the armchair doctors have any idea of your current medications or pre-existing medical problems.
You could try a neoprene knee support or compression sleeve but should really see a physician and get individualized treatment tailored for you.
You could try a neoprene knee support or compression sleeve but should really see a physician and get individualized treatment tailored for you.