Prickly heat is also known as sweat retention syndrome or miliaria rubra.
Miliaria crystallina is the most superficial of the occlusions.
Deeper plugging causes miliaria rubra as the sweat seeps into the living layers of skin, where it irritates and itches.
Miliaria pustulosis (a complication of miliaria rubra) occurs when the sweat is infected with pyogenic bacteria and turns to pus.
Infants are more likely to get miliaria rubra than adults.
Prickly rash, also known as Miliaria, is often the result of underdeveloped sweat glands.
Miliaria crystalline is the mildest form of heat rash.
Often the only symptom present in miliaria crystalline is small red bumps on the surface of the skin similar to blisters rather than an obvious rash.
When a case of miliaria crystalline escalates to the next level, it's diagnosed as miliaria rubra.
Known as the most extreme form of heat rash, miliaria profunda is flesh colored and extremely itchy and painful, some liken the rash to the sensation of "wild fire."