Erythromycin ointment can treat the cat’s anus. The owner should first clean the cat’s anus, dry it to maintain a certain degree of dryness, and then use a cotton swab to dip an appropriate amount of erythromycin ointment into the cat’s anus and apply it gently on the cat. Cats can wear safety pants to reduce contact infections. Pay attention to the hygiene of the cat’s living environment and clean and disinfect it regularly to prevent bacteria from growing and affecting the cat’s health.