Pruritus ani

[BSHC]

Pruritus ani

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This article is about the medical condition. For the comedy bit by Dane Cook and Louis CK, see Dane_Cook#Material.

Pruritus ani
Classification & external resources

ICD-10	L29.0
ICD-9	698.0
DiseasesDB	30154

Pruritus ani is the irritation of the skin at the exit of the rectum, known as the anus, causing the desire to scratch. The intensity of anal itching increases from moisture, pressure, and rubbing caused by clothing and sitting. At worst, anal itching causes intolerable discomfort that often is accompanied by burning and soreness.

[edit] Causes

Anal itching can be caused by irritating chemicals in the foods we eat, such as are found in spices, hot sauces, and peppers. It also can be caused by the irritation of frequent liquid stools, diarrhea, or escape of small amounts of stool (incontinence). Another main cause is yeast infection or Candidiasis.
Some diseases increase the possibility of yeast infections, such as diabetes mellitus or HIV infection. Treatment with antibiotics can lead to a yeast infection and irritation of the anus. Psoriasis also can irritate the anus. Abnormal passageways (fistulas) from the small intestine or colon to the skin surrounding the anus can form as a result of disease (such as Crohn's disease), and these fistulas bring irritating fluids to the anal area. Other problems that can cause anal itching include pinworms, hemorrhoids, tears of the anal skin (fissures), and skin tags (abnormal local growth of anal skin).

This dermatology article is a stub. You can help Wikipedia by expanding it.

v • d • e Diseases of the skin and subcutaneous tissue (integumentary system) (L, 680-709)
Infections	Staphylococcus (Staphylococcal scalded skin syndrome, Impetigo, Boil, Carbuncle) - Cellulitis (Paronychia) - Acute lymphadenitis - Pilonidal cyst - Corynebacterium (Erythrasma)
Bullous disorders	Pemphigus - Pemphigoid (Bullous pemphigoid) - Dermatitis herpetiformis
Dermatitis and eczema	Atopic dermatitis - Seborrhoeic dermatitis (Dandruff, Cradle cap) - Diaper rash - Urushiol-induced contact dermatitis - Contact dermatitis - Erythroderma - Lichen simplex chronicus - Prurigo nodularis - Itch - Pruritus ani - Nummular dermatitis - Dyshidrosis - Pityriasis alba
Papulosquamous disorders	Psoriasis (Psoriatic arthritis) - Parapsoriasis (Pityriasis lichenoides et varioliformis acuta, Pityriasis lichenoides chronica) - Pityriasis rosea - Lichen planus - Pityriasis rubra pilaris - Lichen nitidus
Urticaria and erythema	Urticaria (Dermatographic urticaria, Cholinergic urticaria) - Erythema (Erythema multiforme, Stevens-Johnson syndrome, Toxic epidermal necrolysis, Erythema nodosum, Erythema annulare centrifugum, Erythema marginatum)
Radiation-related disorders	Sunburn - Actinic keratosis - Polymorphous light eruption - Radiodermatitis - Erythema ab igne
Disorders of skin appendages	nail disease: Ingrown nail - Onychogryposis - Beau's lines - Yellow nail syndrome follicular disorders: Alopecia areata (Alopecia universalis) - Androgenic alopecia - Telogen effluvium - Lichen planopilaris - Trichorrhexis nodosa - Hypertrichosis (Hirsutism) - Acne vulgaris - Rosacea (Perioral dermatitis, Rhinophyma) - follicular cysts (Epidermoid cyst, Sebaceous cyst, Steatocystoma multiplex) - Pseudofolliculitis barbae - Hidradenitis suppurativa sweat disorders: eccrine (Miliaria, Anhidrosis) - apocrine (Body odor, Chromhidrosis, Fox-Fordyce disease)
Other	pigmentation (Vitiligo, Melasma, Freckle, Café au lait spot, Lentigo/Liver spot) - Seborrheic keratosis - Acanthosis nigricans - Callus - Pyoderma gangrenosum - Bedsore - Keloid - Granuloma annulare - Necrobiosis lipoidica - Granuloma faciale - Lupus erythematosus - Morphea - Calcinosis cutis - Sclerodactyly - Ainhum - Livedoid vasculitis
see also congenital (Q80-Q84, 757)

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Categories: Dermatology stubs | Symptoms