Getting forearm and elbow pain. Get a sharp pain when my elbow pops and arm locks in place at time when bending. 1 month long. Is it forearm or elbow?

Loose body? Locking of the elbow could be caused by a small free floating piece of bone which can form in a joint much like a piece of sand forms a pearl in an oyster. You should go to a orthopedic surgeon to have some x-rays and get it checked out.