Anal itching is also caused pruritis ani, according to MayoClinic.com. It is intense itching in or around the anus and is often accompanied by a strong urge to scratch. In addition to itching, symptoms of pruritus ani may include burning and pain or soreness in or around the anus. Persons experiencing anal itching should seek medical care if the itching lasts longer than a few weeks, if there's bleeding from the rectum, and if the cause of the itching is unknown.
Poor Hygiene
MayoClinic.com reports that some hygiene habits may lead to anal itching. Excessive washing of the anal region can irritate delicate tissue surrounding the anus. Not washing after bowel movements or not washing thoroughly can lead to skin irritation or infection. Fecal incontinence or frequent diarrhea can also lead to irritated and itchy anal tissues.
Infection
Infection may be the cause of anal itching in many cases according to the Merck Manual. Yeast infections, which usually affect women, can irritate the anal area. In addition, some parasites like the pinworm and scabies cause anal itching. Bacterial infections of the anus usually occur when scratching leads to broken skin tissue, allowing the bacteria to enter the bloodstream. Sexually transmitted diseases may also spread to the anal area and cause itching.
Anal Disorders
Hemorrhoids, enlarged veins in or around the anus, may cause itching, according to MayoClinic.com. Anal abrasions, or superficial skin tears around the anus, can cause itching as well. Anal fissures are deeper tissue tears around the anus. Another possible source of itching is anal fistulas. Anal fistulas are small tunnels that form under the skin and connect infected anal glands to skin around the anus. In addition to itching, hemorrhoids, anal abrasions and fissures and anal fistulas may cause bleeding and painful bowel movements.
Chemical Irritants
MayoClinic.com reports that scented or colored toilet paper, laundry detergent, bath soaps and douches may contain chemicals that are irritating to the anal region. Persons with sensitive skin should attempt to avoid soaps and skin products with strong perfumes and dyes.
Skin Disorders
Certain skin disorders like psoriasis and eczema may cause dry, irritated and itchy anal skin, according to the Merck Manual. Excessive sweating may also lead to anal itching, especially when combined with wearing undergarments that fit too tightly.
