External Analgesic Patches are used for temporary relief of minor aches and pains of muscles and joints associated with simple backache, arthritis, sprains, strains and bruises. Arthritis sufferers use this analgesic patch as do those with lumbago (low back pain) and those relief muscle pain. It is also used for muscle pain, whether it is calf, leg and thigh muscle pain from athletic activity, or back muscle pain or shoulder muscle pain from overexertion.