Why does my baby sweat a lot?

Sweating occurs due to eccrine glands, that is, sweat glands. These glands help to keep the body cool in face of excess temperature, either of the body or the environment. Babies, as such, tend to sweat more. This occurs due to multiple reasons. Babies have more sweat glands in the head as compared to the rest of the body; hence a baby seems to sweat more.
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Dr. Rachna Pande