Bone & Muscle problems

I am a lefty 27 years,173cm, 75kgs. I met with an accident 1.5 year ago to my left knee with which I got left knee pain. Doctor advised me to take x Ray but nothing found in it at that time. Now again I'm feeling pain in my left knee when I play badminton or tt or running for longer time more than 45min. When I am slightly try to move my knee cap I am sensing a movement in my left knee cap. There is no movement in the right one. I don't have any pain while walking n running or bending ... but I am feeling the pain only after playing for more than 45min or so I am still able to play with pain but I am left knee feels exhausted n little pain What problem I am having ? How to detect what tests I have to do ? What's the treatment for it ?

If anyone is having a problem of rhematoid arthritis, then what should she need to take care nd what should she need to have in her food nd what to avoid... please help.

My sister is suffering from tailbone pain post her delivery. The pain was severe earlier but now it has subsided a bit. Still the pain is there in the bone.So I would like to know the remedy of this pain

I am getting pain in finger joints and pain in heel from yesterday, I am not using any new shoes and major of my work is spends before the computer...

Sudden and severe pain in lower footbed. It happens occasionally he was an athlete and left sports from last 2 years.

My left foot has been swollen on the bottom right below my toes. It hurts to walk on it and when I prop it up, it still aches.

Hi my wife and I have pain in our heels especially early morning . This has been going on since 1 month. Not sure if this is coincidence

I have been having lingering pain in my calf that is exacerbated by muscle contraction. I have tried stretching it out multiple times but that does not seem to help.

I am suffering pain from last 3-4 'days Mostly in left foot . It pain like hell. Not able to walk properly

My dad is facing severe back pain...right side of his body...sometimes the pain flows through thighs till knee...whom shud i contact...orthologist or physiotherapist...citi scan and mri are ready