Baby Sweating a Lot - Excessive Sweating
The short answer
Sweating in babies is common, especially on the head, because babies have a high density of sweat glands on their scalp and their temperature regulation is still developing. Sweating during feeding, sleeping, and crying is usually normal. However, excessive sweating during feeds (especially if the baby also breathes fast or tires easily while eating) can occasionally indicate a heart condition. If your baby sweats heavily with feeds AND has poor weight gain or breathing difficulties, mention it to your pediatrician.
By Age
What to expect by age
Newborns regulate temperature poorly and can overheat easily. Sweating, especially on the head, is how they cool down. If your baby is dressed too warmly, in a warm room, or is swaddled snugly, sweating is expected. The AAP recommends dressing babies in one layer more than what adults find comfortable - not more. If your baby's head is damp with sweat, reduce layers. Excessive sweating during breastfeeding is common because skin-to-skin contact generates warmth.
Head sweating remains common at this age. Babies often sweat most during deep sleep because their sweat glands are concentrated on the scalp. If your baby wakes with damp hair, the room may be too warm (ideal is 68-72F) or they may have too many layers. Sweating during feeds is also normal as feeding is hard physical work for babies. If sweating during feeds is accompanied by fast breathing, becoming exhausted after short feeds, or poor weight gain, mention it to your doctor.
As babies become more active (crawling, pulling up), sweating during physical activity is normal. Temperature regulation continues to mature. If your baby sweats excessively even at rest in a comfortable environment, and especially if combined with other symptoms like unusual fatigue, rapid heartbeat, or heat intolerance, an evaluation may be helpful. These situations are uncommon.
Toddlers are constantly moving and often sweat from activity, which is normal. Night sweats can occur during illness, teething, or in a warm room. If night sweats are drenching (requiring clothing or sheet changes) and occur without explanation, mention it to your pediatrician. Localized sweating (one side of the body or hands/feet only) is unusual and warrants evaluation.
What Should You Do?
When to take action
- Your baby's head sweats during feeding or sleeping but they are otherwise healthy and growing well
- Sweating occurs in a warm room or with too many layers and improves when you cool the environment
- Your baby sweats when crying, active, or during skin-to-skin contact
- Your toddler sweats during active play and is otherwise thriving
- Your baby sweats heavily during every feed and also tires quickly, breathes fast, or gains weight slowly
- Excessive sweating occurs even in a cool, comfortable environment
- Night sweats are drenching and happening regularly without fever or illness
- Sweating is localized to one area of the body
- Heavy sweating combined with blue lips, rapid breathing, and poor feeding - this combination could indicate a heart condition
- Your baby is sweating profusely and is lethargic, unusually pale, or has a very rapid heartbeat
- Your baby is showing signs of heat exhaustion: extreme fussiness, flushed skin, rapid breathing, and reduced urination
Sources
Related Resources
Related Medical Concerns
My Baby Sweats a Lot During Sleep
Babies commonly sweat during sleep, especially on their heads, because they spend more time in deep sleep than adults and have developing temperature regulation systems. Most of the time, it's simply that the room is too warm or your baby is over-dressed. Occasional sweating is normal, but excessive or persistent sweating warrants a pediatrician check.
My Baby's Head Sweats While Sleeping
Head sweating is extremely common in babies because they have a high concentration of sweat glands on their scalp and spend more time in deep sleep than adults. Since babies sleep on their backs and can't regulate temperature as well as adults, their heads often get warm and sweaty. This is usually normal, especially if the room is warm or your baby is over-dressed.
Baby Heart Murmur - Innocent vs Concerning
Heart murmurs are very common in children - up to 75% of children will have an audible murmur at some point. The vast majority are "innocent" or "functional" murmurs, meaning there is no structural heart problem. These murmurs are simply the sound of blood flowing normally through the heart and are more audible during fever, illness, or excitement. A smaller number of murmurs indicate a structural heart difference that may need monitoring or treatment. Your pediatrician can usually distinguish between the two and will refer for an echocardiogram if there is any concern.
My Baby's Head Shape Looks Abnormal
Many babies develop temporary head shape irregularities that are completely normal. A cone-shaped head from vaginal delivery reshapes within days. Mild positional flattening (plagiocephaly) from sleeping on the back is very common and usually improves with repositioning and tummy time. However, head shape changes involving ridges, a persistently bulging fontanelle, or rapid head growth changes should be evaluated to rule out craniosynostosis.
I'm Worried About Lazy Eye (Amblyopia)
Amblyopia (lazy eye) is the most common cause of vision loss in children, affecting about 2-3% of kids. It occurs when one eye develops weaker vision because the brain favors the other eye. The tricky part is that amblyopia often has no obvious outward signs - the eye usually looks normal. Early detection through routine vision screening is critical because treatment is most effective in the first few years of life.
Anaphylaxis Signs in Baby
Anaphylaxis is a severe, potentially life-threatening allergic reaction that affects multiple body systems. In babies, it can be caused by food (most commonly), insect stings, or medications. Signs include widespread hives, facial or throat swelling, difficulty breathing, persistent vomiting, and becoming limp or unresponsive. Anaphylaxis is a medical emergency. If you suspect anaphylaxis, use an epinephrine auto-injector if available and call 911 immediately. Early recognition and rapid treatment lead to excellent outcomes in the vast majority of cases.