Symptoms of an abscess include anal or rectal pain, itching, swelling, and fever. Frequently the abscess results in a fistula, which is an abnormal connection between the abscess and the skin where pus drains. [fairview.org]

If you develop a high fever (over 100.4 degrees), shaking chills, persistent vomiting, the inability to have a bowel movement, or extreme anal or rectal pain (with or without a bowel movement), go to the emergency room without delay. [verywellhealth.com]

If you develop a high fever (over 100.4 degrees), shaking chills, persistent vomiting, the inability to have a bowel movement, or extreme anal or rectal pain (with or without a bowel movement), go to the emergency room without delay. [verywellhealth.com]