Erythema Toxicum (Red Blotchy Rash in Newborns)
The short answer
Erythema toxicum is a very common, completely harmless rash that appears in up to 50% of full-term newborns, usually within the first 2-5 days of life. It looks like red blotches with small yellow or white bumps and can appear anywhere on the body except the palms and soles. It resolves on its own without any treatment.
Parents everywhere have the same worry. You are doing the right thing by looking into it.
By Age
What to expect by age
Erythema toxicum typically appears between 24 and 72 hours after birth, though it can occur anytime in the first two weeks. The rash consists of red, blotchy patches that may have a small yellow or white bump (pustule) in the center, sometimes described as looking like flea bites. It can appear on the face, trunk, arms, and legs but spares the palms and soles. The rash comes and goes, moving to different areas of the body. It does not bother your baby and needs no treatment. It usually clears within 5-14 days.
Erythema toxicum should have resolved by this age. If your baby develops a new rash during this period, it is likely a different condition. Common rashes at this age include baby acne, heat rash, or eczema. Any rash that appears with fever, poor feeding, or irritability should be evaluated by your pediatrician.
Erythema toxicum does not occur at this age. New rashes should be evaluated based on their appearance and any associated symptoms.
This rash is exclusively a newborn phenomenon. Any persistent or new skin concerns at this age should be discussed with your pediatrician.
What Should You Do?
When to take action
- Red blotchy patches with or without small white or yellow bumps appearing in the first few days of life
- The rash comes and goes and moves to different areas of the body
- Baby is otherwise well, feeding normally, and not bothered by the rash
- The rash does not appear on the palms of hands or soles of feet
- You are unsure whether the rash is erythema toxicum or something else
- The rash persists beyond two weeks of life
- The bumps appear to contain cloudy or yellowish fluid
- Rash appears with fever, poor feeding, irritability, or lethargy, which could indicate infection
- Blisters, peeling skin, or rash on the palms and soles, which may suggest a different condition requiring evaluation
Sources
Related Resources
Trust your instincts. If something feels wrong, reach out to your pediatrician.
Worrying about your baby means you care. That is a good thing.
Related Skin Concerns
Milia (Tiny White Bumps on Baby's Face)
Milia are tiny white or yellowish bumps (about 1-2mm) that appear on a newborn's nose, cheeks, chin, and forehead. They are caused by tiny keratin cysts trapped beneath the skin and are present in up to 40-50% of newborns. They are completely harmless and disappear on their own within a few weeks to months without any treatment.
Transient Neonatal Pustular Melanosis
Transient neonatal pustular melanosis is a harmless skin condition present at birth, appearing as small pustules that rupture easily, leaving dark brown spots (hyperpigmented macules) surrounded by a fine collarette of scale. It is more common in darker-skinned babies, is not an infection, and requires no treatment. The dark spots fade over weeks to months.
Baby Acne (Neonatal Acne)
Baby acne is a very common, harmless condition that appears as small red or white bumps on your newborn's face, usually around 2-4 weeks of age. It is caused by maternal hormones still circulating in your baby's system and clears up on its own within a few weeks to months without any treatment.
Baby Acne vs Eczema: How to Tell the Difference
Baby acne and eczema can both cause facial rashes, but they look and feel different. Baby acne appears as small red or white bumps, similar to teenage acne, usually on the cheeks, nose, and forehead. Eczema causes dry, rough, red, itchy patches. Baby acne resolves on its own by 3 to 4 months, while eczema may need ongoing management.
Alopecia Areata in Babies
Alopecia areata is an autoimmune condition where the immune system attacks hair follicles, causing round, smooth patches of hair loss. While uncommon in babies, it can occur at any age. The condition is not painful or contagious. Many children experience spontaneous hair regrowth, though it may take months. Your pediatrician or dermatologist can confirm the diagnosis.
Athlete's Foot in Toddlers
True athlete's foot (tinea pedis) is actually uncommon in babies and toddlers but can occasionally occur in children who walk barefoot in moist communal areas. Peeling or dry skin on toddler feet is more often caused by juvenile plantar dermatosis (dry, cracked skin from friction) or eczema rather than a fungal infection.