A perianal abscess is a purulent infection of the soft tissue space around the anus that can be intertwined with an anal fistula. Perianal abscesses should be treated by surgical incision and drainage as soon as pus is formed. Generally, drug changes should be performed daily for 2 weeks after perianal abscess surgery, and gauze should be changed promptly especially after stooling. After two weeks, most of the abscess cavity will be obviously reduced and the purulent discharge will be reduced, so you can change the medicine once every 1-2 days. The requirement of changing medicine for perianal abscess is more strict, each time you must repeatedly wipe the abscess cavity with iodophor swab to clean up the discharge, then reinsert the oil gauze for drainage, and externally use sterile gauze to wrap the treatment. The change of medication for perianal abscess must be operated by professional medical personnel, and patients should usually eat more fresh vegetables and fruits and drink more water to help the recovery of the disease.