Q. My infant perspires profusely from her head while she's sleeping. When she wakes up, it looks like she's been bathing! What's going on?

A. Some babies just sweat more than others  -- infants' bodies are still developing, so their ability to regulate temperature can be a little off. The explanation for the wet head may be that sweat's simply most noticeable there, since the head is such a big part of a baby's surface area.

Even so, be sure you're not overbundling your baby. Babies don't need more than light clothing and a light blanket.

In very rare cases, excessive sweating can be a sign of a heart problem, an overactive thyroid gland, breathing problems, or other medical conditions. It's unlikely that your baby has one of these  -- she'd probably show other symptoms besides just sweating  -- but a chat with the doctor would be a good idea just in case.

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