Please refer to the instruction manual before use. DO NOT use on bare skin. DO NOT use on sensitive skin, on areas of the body that are inflamed, on areas with open sores or wounds, or areas of the body with poor circulation. Extensive use could lead to heating. If the product becomes too warm, discontinue use and allow the device to cool before operating. DO NOT use this device without the cover or if the outer cover becomes worn or damaged in any way. If you are prone to heat sensitivity or are insensitive to heat or have limited temperature perception, then use the heat function with extreme caution. Use a towel, blanket, or other fabric made from non-flammable materials between you and the device to reduce your body’s exposure to heat. Please take 20 to 30-minute breaks between sessions or use. Please be aware that the friction of the rolling shiatsu massage combined with the heat function can intensify the sensation of heat. Wearing baggy clothes while using the massager can increase your risk for burns related to friction. Consult with your doctor before using this massager if you have a serious medical condition such as heart disease, rheumatism, osteoporosis, high blood pressure, or various skin diseases or if you may be pregnant if you have a pacemaker, artificial limb, or pins or screws inside any area of your body.