Deep Heat Heat Rub provides pain relief and heat to soothe aching, injured, and sore muscles. It generates a penetrating warmth that helps increase blood supply to relax and ease discomfort. This heat rub is suitable for relieving muscular pains and stiffness, including back and rheumatic pain, sciatica, fibrositis, sprains, and chilblains. It can be used before or after exercise to provide temporary relief.