Problem with my knees.?

Knee pain is often caused by poor body mechanics, poor strength, poor flexibility and overuse. It may be a good idea to go see your doctor. They can order x-rays to ess for any degeneration. While it is possible it would most likely not be to a degree where it causes that much of a problem for someone your age. You should ask your doctor for a referral to a Physical Therapist. Your doctor may also refer you to an orthopedic doc but this is not required to get x-rays or get a referral to PT.