5. Heat Rash Heat rash, or miliaria, develops when your sweat glands and ducts become clogged. That blockage causes sweat to build up, which brings about small pimple-looking bumps on the skin.

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 rash occurs when sweat becomes trapped under the skin, leading to irritation and tiny, itchy bumps. This condition is more common in hot and humid climates, especially when wearing tight ...