About this item SELF-HEATING PAD: help to improve the blood circulation, promote metabolism, clear the meridians, and enhance immunity, can effectively help to relieve physical local fatigue and pain, anti-inflammatory and analgesic, swelling, suitable for people who suffer from body chills and arthritis. SUITABLE FOR: people who suffer from arthralgia, arthritis, bone hyperplasia and leg muscle pain, It can also help to protect your knee osteoarthritis in the knee, sports injuries, bruises, edema and rheumatic diseases while doing daily activities and health care. SPECIAL MATERIAL: high elastic belt, elastic good, wearing comfortable, paste and solid, changeless form, a good choice for your parents, friends or yourself. SPECIAL MATERIAL: high elastic belt, elastic good, wearing comfortable, paste and solid, changeless form, a good choice for your parents, friends or yourself. Use twice a day, about 2 hours for each time (Do not use while sleeping).