Salt on the wound will aggravate the symptoms, cause infection, delay wound healing and so on. ⒈ aggravate the symptoms: because there is no skin protection at the wound, spreading salt on the wound will form a hypertonic environment, a large amount of water in the cell tissues will be absorbed by the salt, which is likely to cause severe dehydration and necrosis, causing severe pain and aggravating the symptoms of the wound. 　　　Salt itself is prone to carry some bacteria, and spreading salt on the wound is likely to trigger bacterial infection. 　　　　Delaying wound healing: spreading salt on the wound is easy to make the local cell necrosis, and even some purulent secretion will appear, which will eventually lead to the wound has been delayed not to heal. When there is a wound on the skin, it is not recommended to spread salt directly on the wound, which is prone to adverse effects, and should be sterilized under the guidance of a doctor, such as iodine volts, iodine, so as to avoid infection and aggravation of the wound.