muscle pain

Hey, I'd like to know if someone else has this problem, because I haven't been able to find any information online. I have the usual muscle soreness and pain, but a while back I noticed that when I sleep, I contract all my muscles involuntarily, and this causes me to wake up with even more pain...

Looking for suggestions on what could be causing a recent and sudden new symptom: Aching and burning and sore muscles in my legs? It started with my left knee suddenly giving out while I was walking but it didn't hurt, my knee would just sort of buckle. Then it progressed to that knee getting...