The anus is the opening at the end of the anal canal that serves as an outlet for evacuation of stool. Pruritus ani involves pruritis around the anal (perianal) area.

There are multiple causative factors including: poor hygiene; certain antibiotics; contact dermatitis from soaps and toilet paper; eczema caused by certain spices or foods; infections from yeast, fungi or pinworms; systemic diseases; rectal disorders such as skin tags; draining fistulas; tight clothing; and excessive moisture.

Itching that leads to excoriation and secondary infections. Skin in the affected area may be thickened and stripped of tissue as a result of scratching.

Identification of the underlying cause of the condition is essential. Tests related to probable causes of the condition need to be administered and evaluated.

The anal area must be kept extremely clean, using wet cotton or moist wipes. Other treatment measures include: avoidance of irritants; use of steroid ointment; wearing of clothing that is loose and does not retain moisture; and treatment of systemic causes and parasites.

Treatments utilizing surgery, x-ray or injections to produce permanent local anesthesia are usually not required.

• None.

• Rate for the underlying condition.