Bumpy Skin on My Baby's Arms or Cheeks
The short answer
Keratosis pilaris (KP) is a very common, harmless skin condition that causes small, rough bumps that feel like sandpaper, usually on the upper arms, thighs, cheeks, or buttocks. It is caused by a buildup of keratin and often runs in families. While it cannot be cured, gentle moisturizing can improve the texture and appearance.
This is one of the most common questions parents ask. Searching for answers means you care.
By Age
What to expect by age
0-6 months
Keratosis pilaris is less common in very young infants but can appear on the cheeks, especially in babies with eczema or dry skin. The bumps may look like tiny whiteheads or flesh-colored raised dots. They do not bother your baby and require no treatment, though gentle moisturizing after baths can help.
6-18 months
KP often becomes more noticeable during this period, especially on the upper arms and thighs. The skin feels rough and bumpy to the touch, like sandpaper or permanent goosebumps. It tends to worsen in dry winter months and improve with humidity. Regular use of a fragrance-free moisturizer can soften the bumps.
18 months - 3 years
Toddlers with KP may have bumps on their outer arms, thighs, cheeks, or buttocks. The condition is completely painless and does not itch, though it may look red or slightly inflamed in some children. If the skin is itchy or weeping, eczema rather than KP may be the issue and should be discussed with your pediatrician.
3+ years
Keratosis pilaris often persists through childhood and can wax and wane with seasons or skin dryness. While there is no cure, consistent moisturizing helps improve the texture. Some children outgrow it during puberty, while others continue to have it into adulthood. It does not lead to scarring or other complications.
What Should You Do?
When to take action
- Small, rough, flesh-colored or slightly red bumps on the upper arms, thighs, cheeks, or buttocks
- The skin feels like sandpaper or permanent goosebumps but does not itch or hurt
- The bumps tend to worsen in winter when the air is dry and improve in summer humidity
- Your baby or toddler does not seem bothered by the texture and acts completely normal
- One or both parents have a history of similar bumpy skin, eczema, or very dry skin
- The bumps are very red, inflamed, or seem to be spreading rapidly
- The affected skin is itchy, weeping, or forming crusts, which may suggest eczema
- You are unsure if the bumps are keratosis pilaris or another skin condition
- The bumps are not improving despite regular moisturizing and gentle skin care
- The bumpy areas become infected with pus, swelling, warmth, or red streaks
- Your baby develops widespread skin changes along with fever, pain, or signs of illness
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
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.
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.
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.
Bed Bug Bites on Baby
Bed bug bites on babies appear as small, red, itchy welts often in lines or clusters, typically noticed in the morning. Bed bugs are not known to transmit diseases, but the bites can cause significant itching and discomfort. Treatment focuses on managing itch with cool compresses and anti-itch cream while eliminating the bed bug infestation from the home.
Baby Blister on Lip from Nursing
A nursing blister (also called a suck callus) is a small, painless blister or thickened patch on your baby's upper lip caused by the friction of latching during breastfeeding or bottle feeding. It is completely harmless, does not hurt your baby, and does not need any treatment. These are very common in newborns and typically come and go in the early weeks.