Erythema toxicum

Neonatal erythema toxicum
ICD-10	P83.1
ICD-9	778.8
DiseasesDB	4458
MedlinePlus	001458
eMedicine	derm/139  ped/697

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1];Associate Editor(s)-in-Chief: Kiran Singh, M.D. [2]

Overview

Erythema toxicum is a very common rash in infants. It appears in up to half of newborns carried to term, usually between day 2-5 after birth.

Presentation

The rash is composed of small pustular lesions, each on a separate reddened base.

Diagnosis

At times the appearance can raise concern that the rash could be due to herpes simplex, however the latter generally has a more clustered and vesicular appearance.

In uncertain cases, a scraping of a lesion can be done and the fluid examined under the microscope. Herpes lesions will have a positive direct fluorescent antibody test. The fluid from erythema toxicum lesions will show many eosinophils.

Physical Examination

Skin

Face

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  .:Erythema neonatorum toxicum Adapted from Dermatology Atlas.

Trunk

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  .:Erythema neonatorum toxicum Adapted from Dermatology Atlas.
• 
  .:Erythema neonatorum toxicum Adapted from Dermatology Atlas.

Causes

The cause of erythema toxicum is unknown, but it is thought to be a benign condition that causes no discomfort to the infant and the rash will generally disappear spontaneously in about 2 weeks.

External links

• Template:FPnotebook
• Template:DermAtlas
• Photo at University of Iowa

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