Heat rash usually occurs where there is skin on skin contact (e.g. inner thigh, under or between the breasts, or under arm) When your body gets over heated, those areas get especially hot and cause...
ANSWER.
it is what you get from the sun when it is too hot. it is heat wave from the sun and you get a rash which a tiny spots. it goes away easily when you stay out the sun a bit. its not a disease!...