One of those divine instances where the name implies what it is. Its primary function is to relieve cramps, stomach aching, bloating, colic, IBS and menstrual pains. Cramp bark seeks to relieve muscular tension by acting as a muscle relaxer. It is effective in increasing blood flow in joints suffering sever arthritic stiffness and providing relief. Effective for muscle groups surrounding the intestines, airways, uterus, smooth muscles, and striated muscle (attached to the skeleton) in the limbs and back.