Whether skin ulcers can be rubbed with erythromycin ointment, generally based on the severity of skin ulcers, their own body repair ability, and whether the local septic infection and other factors, to carry out an objective analysis. 1, if the skin ulcers are superficial, local necrotic tissues without obvious accumulation of fluid, accumulation of pus, their own healing ability is relatively strong, through the local rubbing of erythromycin ointment, mupirocin ointment and so on, can play a role in If the repair ability is poor, the skin ulceration is deeper and accompanied by obvious accumulation of fluid and pus, then simply rubbing erythromycin ointment can’t completely kill the local bacteria, and can’t achieve the effect of thorough debridement, so it is necessary to use hydrogen peroxide, iodine, saline alternately to remove the local necrotic tissues, and strengthen the anti-infection treatment in order to make the skin clean and healthy. Anti-infection treatment can make the skin ulcer faster healing.