Hot moxibustion is carried out by hot compress of acupoints above the surface of human skin, and its warming effect penetrates through the skin layer and is conducted through meridians to achieve various effects. It is a kind of traditional Chinese medicine physical therapy with no harm to human body and unique health care function. Long-term use can achieve better physical therapy and health care benefits. Polaroid electric sea salt hot bag is fine, and it will be hot in a while.