Erythromycin ointment has anti-inflammatory and antibacterial effects. If there is local infection or inflammation in the anus, you can use erythromycin ointment to apply to the anus. It is suitable for the following situations: 1. repeated defecation after diarrhea leads to redness, swelling and stinging of the perianal mucosa due to irritation, you can take an appropriate amount of erythromycin ointment and apply it to the discomfort. 2. symptoms such as hemorrhoid infection, perianal abscess infection and anal fistula infection appear in the anus, you can rub erythromycin ointment, as erythromycin is an antibiotic, it cannot be used for a long time, it will reduce the resistance of the skin, if the application does not work for a week promptly If there is no effect for a week, go to the hospital for treatment. If there are no symptoms of anal infection, it is not recommended to apply erythromycin, pay attention to perianal hygiene in daily life, wash every day, do not eat spicy, indigestible food, and defecate on time every day.