Pruritus Ani is a bothersome and sometimes intense itching or burning sensation of the skin around the anus (rectal opening). It is most noticeable at night or after a bowel movement. The most common complaint is an irresistible urge to scratch. Some people will note occasional bleeding when wiping after a bowel movement. This is a common problem that affects up to 5% of the population. It affects men and women equally and may occur at any age.