Do you feel persistent pain in your back, neck, shoulders, or joints? Bio Health Pain Relieving Patch for Back, Neck, Shoulder, Knee Pain and Muscle Soreness provides temporary relief from aches and pains. These patches offer powerful 8 hour time-released relief for up to 48 hours after use. Each patch is made with a unique adhesive containing menthol and methyl salicylate for a soothing warm feeling. This combination of menthol and tourmaline crystal provide deep penetration of muscle tissue for effective relief from soreness without burning sensations. In addition, the natural Tourmaline crystals provide Far Infrared Rays (FIR) that help increase blood circulation to improve the health of sore muscles. These OTC patches can provide convenient drug-free relief while being gentle on skin. Unlike many OTC pain relievers or creams that can cause stomach irritation or ulcers in long-term use, ROM AMERICA Bio Health Pain Relieving Patches are safer to use because they stimulate the bodys own natural healing process with zero risk of overdose and no adverse side effects. With no reported allergic reactions or skin irritation thus far, this is a great option to reduce discomfort associated with chronic muscle or joint pain.