Erythema toxicum — also called erythema toxicum neonatorum (ETN) or toxic erythema of the newborn — is a common rash seen in full-term newborns. It usually appears in the first few days after birth and fades within a week. Up to half of all newborns will have ETN. The rash can be on the baby's face, chest, arms, and legs, but usually won't be on the palms or soles of the feet. It's a blotchy red rash with small bumps that can be filled with fluid. Although the fluid might look like pus, there is no infection. Because erythema toxicum doesn't cause any symptoms and goes away on its own, no treatment is needed. Follow your doctor's advice about caring for your baby's skin. Call your doctor if your baby has a rash and is also fussy, not feeding well, or has a fever. Back to Articles Related Articles Henoch-Schönlein Purpura (HSP) Most kids who develop this inflammation of the blood vessels (marked by a raised red and purple rash) make a full recovery and have no long-term problems. Read More The First Day of Life Your baby's here! Find out what to expect on that special day first day of life. Read More Cytomegalovirus (CMV) This virus poses few risks to healthy kids, but can cause serious health problems in unborn babies and kids with a weak immune system. Read More Erythema Multiforme By the looks of the "bulls-eye" marks this rash leaves on the skin, you might think it's cause for concern. But erythema multiforme clears up on its own within a few weeks. Read More Hives (Urticaria) Has your child broken out in welts? It could be a case of the hives. Learn how to soothe itchy bumps and help your child feel better. Read More Scarlet Fever Scarlet fever is an illness caused by a strep infection. It causes a red, bumpy rash that spreads over most of the body, and is treated with antibiotics. Read More Fifth Disease Especially common in kids between the ages of 5 and 15, fifth disease is a viral illness that produces a distinctive red rash on the face, body, arms, and legs. Read More Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.