My 3 year old granddaughter Aly has 3 birthmarks, 2 are fairly large and raised (strawberry). She sweats a lot more than her 4 year old sister. Her head is usually soaked when she wakes up from sleep. My friend who has 3 children under the age of 6 noticed it when we were at the playground and asked about it. I didn't think much of it until when touching her birthmark on her leg I noticed it was quite a bit warmer than the rest of her skin. So, I'm now curious if there might be a connection.