Folliculitis

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Folliculitis Classification and external resources
Folliculitis, Fungal; Pustular Diseases Image courtesy of Professor Peter Anderson DVM PhD and published with permission © PEIR, University of Alabama at Birmingham, Department of Pathology
ICD-10	L73.8
ICD-9	xxx
DiseasesDB	31367
eMedicine	DERM/159

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Folliculitis is the inflammation of one or more hair follicles. The condition may occur anywhere on the skin.

Causes

Most carbuncles and furuncles and other cases of folliculitis develop from Staphylococcus aureus.

Folliculitis starts when hair follicles are damaged by friction from clothing, blockage of the follicle, or shaving. In most cases of folliculitis, the damaged follicles are then infected with the bacteria Staphylococcus (staph).

Iron deficiency anemia is sometimes associated with chronic cases

• Sycosis barbae or Barber's itch is a staph infection of the hair follicles in the bearded area of the face, usually the upper lip. Shaving aggravates the condition.

• Tinea barbae is similar to barber's itch, but the infection is caused by the fungus T._rubrum.

• Pseudofolliculitis barbae is a disorder occurring primarily in men of African descent. If curly beard hairs are cut too short, they may curve back into the skin and cause inflammation.

• Hot tub folliculitis is caused by the bacteria Pseudomonas aeruginosa often found in new hot tubs. The folliculitis usually occurs after sitting in a hot tub that was not properly cleaned before use. Symptoms are found around the body parts that sit in the hot tub -- typically the legs, hips and buttocks and surrounding areas. Symptoms are typically amplified around regions that were covered by wet clothing, such as bathing suits.

Symptoms

• rash (reddened skin area)
• pimples or pustules located around a hair follicle
  • may crust over
  • typically occur on neck axilla, or groin area
  • may be present as genital lesions
• itching skin

Treatment

1. Topical antiseptic treatment is adequate for most cases
2. Some patients may benefit from systemic flucloxacillin
3. Topical antibiotics such as mupirocin ointment

See also

• Ingrown hair

External links

• Medline Plus (NIH) article on Folliculitis
• Medline Plus (NIH) article on Hot tub folliculitis
• Links to folliculitis pictures (Hardin MD/Univ of Iowa)
• Ingrown Hair Information
• Gladwin Medical Blog

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) - Pimple (Pustule)
Bullous disorders	acantholysis (Pemphigus, Transient acantholytic dermatosis) - Pemphigoid (Bullous, Mucous membrane, Gestational) - Dermatitis herpetiformis
Inflammatory	Dermatitis and eczema Atopic dermatitis - Seborrhoeic dermatitis (Dandruff, Cradle cap) - Contact dermatitis (Diaper rash, Urushiol-induced 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, Lymphomatoid papulosis) - other pityriasis (Pityriasis rosea, Pityriasis rubra pilaris) - other lichenoid (Lichen planus, Lichen nitidus) Urticaria and erythema Urticaria: Dermatographic urticaria - Cholinergic urticaria Erythema multiforme/drug eruptions: Stevens-Johnson syndrome - Toxic epidermal necrolysis - Erythema nodosum Other erythema: Erythema annulare centrifugum - Erythema marginatum - Necrolytic migratory erythema - Erythema toxicum
Radiation-related disorders	Sunburn - Actinic keratosis - Polymorphous light eruption - Radiodermatitis - Erythema ab igne
Pigmentation disorder	hypopigmentation (Albinism, Vitiligo) - hyperpigmentation (Melasma, Freckle, Café au lait spot, Lentigo/Liver spot, Acanthosis nigricans)
Other	keratosis/hyperkeratosis (Seborrheic keratosis, Callus) - other epidermal thickening (Ichthyosis acquisita, Palmoplantar keratoderma) skin ulcer (Pyoderma gangrenosum, Bedsore) atrophic (Lichen sclerosus, Acrodermatitis chronica atrophicans) necrobiosis (Granuloma annulare, Necrobiosis lipoidica) - other granuloma (Granuloma faciale, Pyogenic granuloma) vasculitis (Livedoid vasculitis, Erythema elevatum diutinum) Keloid - Systemic lupus erythematosus - Morphea - Calcinosis cutis - Sclerodactyly - Ainhum
Disorders of skin appendages	Nail Ingrown nail - Onychogryposis - Beau's lines - Yellow nail syndrome - Leukonychia Hair Hair loss Alopecia areata (Alopecia totalis, Alopecia universalis, Ophiasis) Androgenic alopecia - Hypotrichosis - Telogen effluvium - Traction alopecia - Lichen planopilaris - Trichorrhexis nodosa Other Hypertrichosis (Hirsutism) Acneiform eruption (Acne vulgaris, Chloracne, Blackhead) - Rosacea (Perioral dermatitis, Rhinophyma) follicular cysts (Epidermoid cyst, Sebaceous cyst, Steatocystoma multiplex) Pseudofolliculitis barbae - Hidradenitis suppurativa - Folliculitis Sweat glands eccrine (Miliaria, Anhidrosis) - apocrine (Body odor, Chromhidrosis, Fox-Fordyce disease)
see also congenital, neoplasia

ar:طفح حوض الإستحمام de:Follikulitis et:Follikuliit nl:Folliculitis

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Acknowledgement and Attribution Regarding Sources of Content

Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .