What are the risk factors for anorectal abscess?

Rectal abscess: The most common predisposing factor is an anal fissure. Inflammatory bowel disease is possible, and a number of diarrheal infections could increase risk. If there is sexual activity involving your anus, especially penile penetration or vigorouf fingering, that's also a possiblity. Howeever, many cases occur without any of these particular factors; some are just random bad luck.