Heat therapy, or thermotherapy, harnesses the power of warmth to promote healing and alleviate discomfort. When applied to the back, heat packs work by increasing blood flow to the targeted area, which helps relax tense muscles and soothe stiffness. The warmth encourages circulation, thereby delivering essential nutrients and oxygen that promote healing. Additionally, heat can trigger the body’s natural pain-relieving responses, releasing endorphins and providing significant relief from discomfort.