A heat pack is a commercial product used by hikers and skiers as a hand warmer. It consists of a plastic pouch filled with a supercooled solution of sodium acetate (NaCOOCH 3). When a metal disc in ...

Heat packs and cold packs can offer relief, but choosing between the two can be baffling. Which will be best for your particular pain? Dr. Rajiv Bahl, an emergency medicine physician in central ...