... muscle aching, back aching, cramps arthritis pain and tenontodyniaUsage1) To activate: place the metal inside between forefinger and thumb, press ... crystallization completed, squeeze the hot pack to make it soft and ready to use2)To recharge: place the hot pack in ... gives soothing effect to rheumatic conditions of joints as well as pain caused by abdomen, stomach, waist, leg, shoulder, neck and nerves ...