Anyone wake up with extremely sharp pain in their ankle for no reason? It happens every 3-4 months, extremely painful and walk like I have a sprain. Tomorrow or the next day it will be completely gone when I wake up. It's strange, but has happened for many years. I searched but it refers to long term illnesses like lupus and rheumatoid arthritis, which I have no signs of. Maybe just a pinched nerve? I've done nothing to injure it, no swelling, just very sharp pain.