Anal itching

Introduction Anal pruritus (peritus ani. PA) is a common local pruritus. Sometimes the anus is slightly itchy, such as severe itching, and it becomes pruritus when it is not cured for a long time. It is a common localized neurological dysfunction skin disease. Usually only around the anus, and some can spread to the perineum, vulva or scrotum. It occurs mostly at noon and old age between 20 and 40 years old, and young people under the age of 20 are few and rarely occur in children. Men are more common than women, and people who are used to quiet and infrequent exercise often suffer from this pruritus. Secondary pruritus has obvious pathogenic causes, is easy to treat, and often recurs, accounting for about 50% of all patients.

Cause

Causes of secondary anal itching caused by anal fistula, anal eczema, genital warts, neurodermatitis, anorectal tumors, and aphids. Edible spicy food can also cause anal itching, poor hygiene habits, not clean the anus perineum in time, rubbing the pants and rubbing, can make itching worse. Poor dressing, wearing narrow underwear, or wearing uncomfortable underwear such as some chemical fiber fabrics or thick and rough, so that the hip sweat is not easy to emit and rubbing can also induce anal itching. The anal itching seen in children is mostly caused by tsutsugamushi patients. The female mites ooze out of the anus and form mechanical stimulation to cause anal itching.

an examination

Related inspection

Anal finger examination anus examination of rectal-anal motor function

According to the typical history of anal itching, combined with clinical symptoms and signs, it is not difficult to diagnose the disease, but it is more difficult to determine the cause. In general, the local anal area has a primary disease that becomes secondary pruritus, otherwise it is primary pruritus. In addition, a full physical examination should be carried out to conduct necessary laboratory tests, such as blood, urine, stool routine, liver and kidney function, urine sugar, blood sugar, glucose tolerance test, and biopsy and smear. According to the cause can be divided into primary itching and secondary itching.

1. Primary itching. Primary itching is not associated with primary skin damage, with itching as the main symptom.

2. Secondary itching. Secondary pruritus is caused by primary diseases and various skin diseases, with obvious specific skin lesions and primary lesions. Itching is often a symptom of primary lesions. Such as anal fistula, anal eczema, genital warts, neurodermatitis, anorectal tumors, aphids and other anal itching are such.

Initial anal itching is lighter, there is no obvious change in the anus skin, mostly paroxysmal. Itching is more frequent in patients with chronic illnesses, and lasts longer, especially at night. Excessive scratching or mechanical stimulation makes the perianal skin hypertrophy and rough, anal folds deepen, local scratches, blood stasis, exudate, wrinkles In the residual fecal dirt, even more severe can be combined with infection with pus or purulent secretions, flushing and swelling. The lesion can be extended to the perineum, scrotum, female vulva and even double-hip skin. Clinical examination can be found in internal hemorrhoids, external hemorrhoids, mixed hemorrhoids, anal fistula, or laboratory tests for diabetes, tsutsugamushi, Candida albicans infection.

Differential diagnosis

Differential diagnosis of anal itching:

1, perianal eczema: perianal eczema is a common non-infectious skin disease, lesions are mostly confined to the skin around the anus, occasionally spread to the buttocks, perineum and clitoris, local rash, erythema, erosion, infiltration Out, crusting, desquamation. The course of the disease is long, the skin around the anus is often thickened, the color is gray or dark red, rough, so that cleft palate, exudation, itching, repeated hair as the main feature, can occur at any age.

2, anal night itching: tsutsugamushi disease is an intestinal parasitic disease that causes the anus and perineal itching as a special film. Ascariasis is a common parasitic disease in which children are transmitted to each other. The main symptoms are itching around the anus, even worse at night, the child is irritated, sleepless, or scratching itching with hand rubs, which can cause inflammation of the perianal area or other skin diseases and insomnia, enuresis and other diseases.

The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments.