Both knee pain and back pain can be very serious. Try your best to take proactive steps to reduce it as early as possible. The video below shows a quick tactic you can utilize while sleeping to alleviate both knee and back pain. I suffered from clicking in my knees and a slipped disc in the past. This sleeping position helped me. If you're like me and find it hard to sleep on your back - try thinking of a a cool ocean breeze or some other abstraction that makes you happy while you focus on taking big full breaths. As always if this gives you pain you should stop and consult a doctor.