Keep the indoor air fresh when cupping, avoid direct fan blowing in summer, and keep warm indoors in winter to avoid feeling cold. Pay attention to cleaning and disinfection. Both the performer's hands and the recipient's cupping parts should be cleaned or disinfected routinely. Cupping instruments must be disinfected routinely, and there are blood stasis, small water droplets and itching. Cupping can cause blisters and bleeding spots on the skin, which are normal therapeutic reactions. General yang syndrome and heat syndrome show bright red ecchymosis; Yin syndrome and cold syndrome are mostly purplish red or reddish ecchymosis; Cold syndrome and wet syndrome often show blisters and drops; Deficiency syndrome is usually flush or reddish. If there is no ecchymosis or flushing locally, it will disappear immediately after cupping, indicating that the condition is still light, not serious or close to recovery.