I was standing on the edge of my right foot, when I suddenly felt serious pain in the middle. My big toe became straight, stiff, and hard to move. The pain was near the middle and a bit on the top of my foot. It slightly hurt when I tried to stand, but it was only temporary. I poked around until I could stop the pain and get my toe to move again. It has been an hour and I can still tell that it is not fully fixed. Any diagnosis? Thank you in advance.