Erythema

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Erythema Classification and external resources
ICD-10	L51.-L54.
ICD-9	695
DiseasesDB	4466
MeSH	D004890

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Erythema is redness of the skin caused by capillary congestion.

It can be caused by infection, massage, electrical treatments, acne medication, allergies, exercise or solar radiation (sunburn), and waxing and plucking of the hairs any of which can cause the capillaries to dilate, resulting in redness. Erythema is a common side effect of radiotherapy treatment due to patient exposure to ionizing radiation.

Associated conditions

• Erythema ab igne
• Erythema induratum
• Erythema infectiosum (or fifth disease)
• Erythema marginatum
• Erythema migrans
• Erythema multiforme (EM)
• Erythema nodosum
• Erythema toxicum
• Palmar erythema

In about 30-50% of cases, the cause of Erythema is unknown.

See also

• Flushing (physiology)
• Rash
• Radiotherapy

Pathological Findings

Image courtesy of Professor Peter Anderson DVM PhD and published with permission © PEIR, University of Alabama at Birmingham, Department of Pathology

External links

• UM
• Doctor Update

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 hair loss: Alopecia areata (Alopecia totalis, Alopecia universalis, Ophiasis) - Androgenic alopecia - Telogen effluvium - Traction alopecia - Lichen planopilaris - Trichorrhexis nodosa other follicular disorders: Hypertrichosis (Hirsutism) - Acne vulgaris - Rosacea (Perioral dermatitis, Rhinophyma) - follicular cysts (Epidermoid cyst, Sebaceous cyst, Steatocystoma multiplex) - Pseudofolliculitis barbae - Hidradenitis suppurativa - Folliculitis 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 - atrophic (Lichen sclerosus, Acrodermatitis chronica atrophicans) - Keloid - necrobiosis (Granuloma annulare, Necrobiosis lipoidica) - Granuloma faciale - Lupus erythematosus - Morphea - Calcinosis cutis - Sclerodactyly - Ainhum - vasculitis (Livedoid vasculitis, Erythema elevatum diutinum) - Pyogenic granuloma
see also congenital (Q80-Q84, 757)

ca:Eritema

de:Erythemafr:Érythème it:Eritema nl:Erytheem ja:斑uk:Ерітема wa:Rodjeur del pea

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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 .