Definition of Erythema toxicum:

Erythema toxicum is a common, noncancerous skin condition seen in newborns.

Causes, incidence, and risk factors:

Erythema toxicum may appear in 50 percent or more of all normal newborn infants. It usually appears in term infants between the ages of 3 days and 2 weeks.

Its cause is unknown.

The condition may be present in the first few hours of life, generally appears after the first day, and may last for several days. Although the condition is harmless, it can be of great concern to the new parent.