Some knee pain can ease on its own. However, if you notice persistent pain, you should contact a physical therapist. Many people try to push through the pain that they feel; however, this can actually cause an issue to worsen and become more problematic. Sharp or dull pain in the knee should be paid attention to and not pushed through. If pain persists, especially for three months or longer, it is in your best interest to contact a physical therapist, as that can be an indication of a chronic condition.