1, it may be left for too long or cupping is too fierce.

2. After cupping, blisters, water droplets, bleeding spots, congestion and other phenomena on the local skin belong to normal treatment reactions. Those with mild blisters only need to prevent skin inflammation and wait for its natural absorption; When the blister is large, it often indicates that the condition is serious. Sterilizing needle can be used to break the water at the root of blister, so as to sterilize gauze and prevent infection.