Am i supposed to wear a knee brace during rehabilitation excersises?

Not necessarily: It depends on what injury you are trying to rehabilitate. The use of knee braces is controversial, with no solid evidence regarding their use. Most surgeons will use a post-op brace to protect the knee during the early post-op period, but rehabilitation exercises are designed to restore motion and strength with a low risk of injury, even without a brace.

Have it evaluated.: Different knee conditions may need different types of treatment. Have your knee evaluated by a professional and get the appropriate treatment for your condition.