My almost three year old son suddenly refuses to walk on one of his feet as of last night. It seems to be hurting towards the big toe area. There is no cut, swelling, sign of injury... nothing! I can bend and move all of his toes and ankle and he shows no sign of pain. It’s only when he puts weight on it. He doesn’t seem in any pain when he’s not putting weigh on it. He is very limited verbally so he can’t tell me exactly what’s wrong. Based on his facial expressions I can tell that he’s in pain when he tried to stand up.

We are stumped as to what’s wrong! Any ideas??