Bone & Muscle problems

The inside of my left knee is twitching violently. I cannot make it stop. I am trying to sleep but its twitching violently. I am a 21 year old male and I play tennis full time. When I squat my knees make a cracking boise too. What is the problem?

Hello sir I have a pain in my back side of thigh. it me be sciatic nerve pain.due to wich I have pain in my heel also.pls advice me to get rid of it

I have AS from around one month which was diagnosed two days ago. I have controlled pain but it really gets worse at night and in morning. I am able to walk which is not perfect as there is slight pain. But my concern is that  I am not able to do snap movements or faster movements. I think I'm not even able to run currently. I would like to know how to relieve from pain. And what are the things I need to take care of for future reference like any particular diet I should avoid or sleeping posture. Thanks

I have been having pain in my ribs and back since before I had my gallbladder removed on April 13th now it's worse plus had a csection on February 9th.

I played soccer today and I hurt my front right thigh. It hurts a lot when I bend it but doesn't hurt so much when I sit or lay down. I can stand and walk on it but I have to keep it straight. There is no discoloration or abnormal swelling, it only feels tight. Is there anything that this could be?

My mother sometimes feels pain in bones including joints. However, she is regularly consuming calcium tablet. Please suggest which specialist doctor I should see her.

Pain to where i had to limp in my right butt cheek and hip. Could barely walk. Sciatic nerve maybe? Hurt pretty bad and it happened more than once in the past few weeks.

I am 34 aged male and I have been feeling discomfort and mild sharp pain around both knees as well as backside and sides It started last week with kind of some discomfort but all of a sudden it came well noticeable now. When I consulted ortho doctor he said it would be knee meniscus tear and am afraid anything series that would impact my day to day life and am very anxious if any treatment to cure it completely.

Daily muscle pain is increasing and I'm becoming very weak . Can't able to walk more than  kilometers

I have problem of avn in right hip..earlier I had replacement of left hip now having unbearable pain in right side is there any treatment to avoid replacement again