After the hand is scalded and swollen, emergency treatment such as washing under tap water and subsequent treatment such as cleaning up the wound should be carried out in time. 1. Emergency treatment: the hand can be drenched under tap water or immersed in 15-20 ℃ water, or with cold water wet towels, gauze, etc. for wet compresses. At the same time, pay attention to protect the wound to avoid secondary damage, etc. 2. Follow-up treatment: mainly timely medical treatment of the wound, including cleaning of the surrounding healthy skin, can use benzalkonium bromide, chlorhexidine, etc. for cleaning and disinfection. If there are large blisters, the blister fluid can be removed with a sterilized empty needle. For those with significant pain, sedative analgesic drugs such as diazepam may be used as appropriate. The use of specific drugs and subsequent wound treatment should be carried out under the guidance of a doctor. It is recommended to consult a doctor in time for diagnosis and treatment.