I'm getting pain in my right knee when going upstairs, running is fine. Anyone had this?

[Canary1902]

It's become worse over the last few days, really quite painful once I get to the top of a normal flight of stairs. Running for 30 mins is fine though. Anyone know what this could be?

Thanks.

[caribougrrl Graduate]

does it also hurt getting out of a chair, or squatting?

I had a problem a couple years ago where both my kneecaps migrated outside the groove they are supposed to hover over, thus where rubbing against bone when did any significant knee-bending (including going UP stairs)... physiotherapy fixed me up.

see a medical professional though, especially if it's PAIN not discomfort