... on muscle aches, back aches, cramps, arthritis pain and tendonitis.d) Can be reused hundreds times by following ... : wrap the hot pack in a tea towel and place in a pot of boiling water. Boil for 5 ... water with rounded metal or silicone tongs. Do not pick up with a sharp object.b) To activate: ... in the abdomen, stomach, waist, leg, shoulder, neck and nerves. Use in the winter, inside clothing, gloves or ...