Spreading salt on the ulcer wound is not necessarily able to accelerate the healing of the wound. There are several reasons: First, the salt will be sprinkled on the ulcer wound, the salt dissolved wound hypertonic state, which can cause a lot of water exudation, resulting in the wound is too moist, which is not conducive to the growth of fresh granulation tissue. Second, the external salt does not guarantee absolute sterility, which may bring external bacteria into the ulcer wound, aggravate the local infection and cause redness, swelling and pain in the wound. Clinically, although saline has a certain inhibitory effect on bacterial growth, but for ulcer wounds, you should use vitality iodine, hydrogen peroxide, saline to disinfect the treatment, in order to completely remove the bacteria in the wound, the simple use of salt external application is not scientific and not standardized.