A blister of 2cm caused by a scald is a second-degree scald, which is less likely to be self-absorbed, so in the clinic it needs to be pricked and sterilized after draining the exudate to prevent infection. Blisters of 2cm in size caused by scalding are considered to be superficial second-degree scalds, injuring the superficial dermis layer of the skin. The possibility of self-absorption is small, so in the clinic, you can use a disposable syringe needle to pick the lowest position of the blister, drain the exudate inside the blister, and don’t cut off the wall of the blister completely, so that the trauma can play a certain role in protection. After the blister is pierced, it is recommended to use iodophor and other disinfectant to wipe and disinfect, and then apply wet burn cream and other medications for burns if necessary, to prevent the wound from becoming infected and to promote wound healing. It is recommended that patients go to the hospital, by a professional physician for treatment, drugs need to be used under the guidance of a professional physician to avoid delays in the condition.