Coralite backache patches helps to relieve minor aches and pains by targeting the affected area and delivering concentrated relief. The pain patches can also be used for arthritis pain relief, strains, bruising and sprains. The discreet design can be used without making a mess and can be worn comfortably under your clothes. Made with lidocaine, just one of our muscle soreness relief patches can offer pain relief for up to 8 hours.