The primary cause of perianal abscesses is recurrent infections at the anal crypts, also known as repeated episodes of cryptitis. Generally, when cryptitis recurs and forms a local infection foci, early symptoms of a perianal abscess include pain in the anus and anal canal, accompanied by pus discharge from the anal canal. When the condition progresses to a certain extent, there will be hard pus pockets or pus formation. Once the infection within the pus pocket completely turns into pus, the patient will experience intense pain, manifesting as throbbing pain. Therefore, to alleviate the pain, it is necessary to promptly incise and drain the pus and further remove the local infection foci completely.