Can therapy is the use of jars as a tool, the use of fire, pumping methods to generate negative pressure, so that the adsorption on the surface of the body, causing local blood stasis, in order to achieve the effect of meridians, blood circulation, swelling, pain, wind and cold dispersal therapy. Can therapy methods: can therapy is mainly divided into retention method, walking can method, flash can method, blood cupping method, retention needle cupping method. The main indications for canning therapy: 1, psoriasis 2, herpes zoster 3, acne, multiple folliculitis, boils 4, generalized eczema dermatitis 5, pruritus, etc.