Swelling of Skin:
As in most cases of heat rashes, the heat rash goes away on its own after taking a cold shower or using some natural remedy on the affected area. However, in the case of severe heat rashes, the sweat glands might become infected due to certain infectious bacteria from the surrounding environment. When there is the development of infection in the areas of skin, then there is a severe swelling of skin surface along with pain and redness that does not resolve very easily. Moreover, if the condition worsens, the people also experience the formation of pustules at the site of the rash. The inflammation might also be internal, as in the case of Miliaria rubra, in which there is inflammation of the deepest layer of skin. The internal swelling prolongs if there is no appropriate treatment for the inflammation.