I Experience Spasm Type Pain In Abdomen Area When Bending

I experience spasm type pain in abdomen area when bending or doing muscle exercises in that area. The pains gets harder with each rotation of what feels like a Charlie horse in my stomach. Sometimes high in area other times low. Takes about 3 mins for these rotational spasms to go away. During onset, I can feel my abdomen area having movement, as if a baby were in there stretching.