This rash is also called erythema toxicum. It is a common skin condition that affects many newborns. It is not serious and isn't contagious.
The rash may appear as small blisters on a red base. The blisters may have a white or yellow liquid inside. Sometimes there are just red spots. The rash may be present at birth, but it more often appears within 24 to 48 hours after birth. In most cases, it goes away within 1 week. Usually no treatment is needed.
Home care
Bathe your baby as you normally would. No changes in skin care are needed.
Follow-up care
Follow up with the health care provider, or as advised.
When to get medical advice
Contact the health care provider right away if your baby:
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Has a fever of 100.4°F (38°C) or higher. (Get medical care right away. Fever in a young baby can be a sign of dangerous infection.)
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Has a rash that lasts longer than 1 week.
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Has a rash that changes appearance or becomes dark purplish in color.
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Won’t stop crying or is very fussy and can’t be soothed.
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Appears very drowsy or limp.
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Refuses to feed.
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Shows signs of dehydration, such as no wet diapers for 6 to 8 hours or very dark, smelly urine; no tears when crying; or dry mouth and lips.
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Online Medical Reviewer: Bass, Pat F III, MD, MPH
Online Medical Reviewer: Fraser, Marianne, MSN, RN
Date Last Reviewed: 04/01/2025
© 2000-2026 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.
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