I have a sharp pain in my hip and sometimes it moves to my knee and i can barely walk because the pain is really bad. what could it be?

Possibilities: This could be due to arthritis or an injury to the joints you mentioned, or it could be due to compression of a nerve. If it does not improve or if it worsens, i would consult with your doctor.

Hip and knee pain: This pain may be caused by a nerve compression coming from your back called sciatica. It may be arthritis of the hip. See your doctor about finding out what is the reason for the pain.

Hip pain: You need to be examined by a doctor. It could be your hip. Hip pain can radiate to the knee.