Lumbar muscle strain, also known as functional low back pain, chronic low back pain, myofascitis of waist and leg, etc. , is one of the common causes of low back pain. The main symptoms are swelling, pain and soreness in the waist or lumbosacral region, and the pain can change with climate change or fatigue. The use of Tianditong far-infrared magnetotherapy patch will have a certain relief effect. It uses the triple effects of far infrared physiotherapy, hot soldering iron and magnetic therapy to promote human blood circulation and achieve the effects of diminishing inflammation and relieving pain. It keeps the temperature at 40℃ for one minute and gives off heat for 8- 12 hours. ,? Non-woven breathable viscose material is tasteless and very docile.