Knee pain

[C2190]

Hi,

For a while now I've had pain in both my knees. Over the past month or so my left knee has started "crunching" when I kneel down and stand up, it's getting quite painful to walk up and down the stairs and it sometimes pops out of place. I'm in my 30s and do alot of walking for my job. Thankfully I have my physio appointment soon but I'm just wondering if anyone can shed some light on what it could possibly be?

Tia x

I have something similar, older than you though. I had an xray recently which showed nothing. Recently my knee has become swollen and the doctor has diagnosed tendonitis (sp?) which apparently can take weeks to heal, he's told me to apply ibuprofen gel, keep it raised and use ice packs.