If these bumps are filled with puss, then it is called milaria pustulosa. Miliaria profunda is the least common form of heat rash, and it causes painful or itchy bumps that are representative of ...

Heat rash (miliaria or prickly heat) happens when sweat gets trapped and blocks the sweat glands. It causes inflammation and ...

You may experience irritated, swollen skin that can be itchy ... The rash itself may include painful, fluid-filled blisters. 5. Heat Rash Heat rash, or miliaria, develops when your sweat glands ...