Heat rash is something that adults, children and infants can experience when sweat gets trapped underneath the skin, according to the Mayo Clinic. Symptoms of heat rash can range from small ...

Heat rashes may have: It can be hard to tell the difference between a rash and a birthmark on a baby. Birthmarks often appear ...

In children, it might be caused by wearing sweaty clothing or wet diapers for long periods of time. Heat rash has short flare-ups and can be cleared up fairly easily. The largest difference ...