Other ways to get rid of heat bumps include using a simple ice pack, made with a few ice cubes in a plastic bag with a cloth tied around it. Cooling off in a cool shower can also be effective, although try to make sure that you dry naturally as the use of a towel can irritate the skin further. Applying baking soda to the bumps absorbs the excess water on your skin that turns into heat bumps. Aloe Vera can also be used to relieve the swelling of irritated skin. The natural Aloe Vera is the most effective as commercial lotions contain chemicals that can block your pores and lead to rashes and further heat bumps.
There are a number of reasons that people get heat bumps. Tight clothing when performing any physical activity causes rubbing and can create heat bumps and rashes. This is because the clothes hold in the moisture, and looser clothes will allow the sweat to evaporate quicker and diminish the amount of heat bumps and rashes. Cells on the surface of the skin are damaged and the sweat builds up in the affected area.
The heat bumps themselves are a form of dermatitis: Photo allergic dermatitis. This condition can be genetic and Native American people are affected more than any other. Limiting the exposure to the sun at the beginning of the summer, or trying to stay out of the sun altogether should help to reduce the heat bumps. In severe cases the heat bumps can affect the body's heat regulation mechanism and cause fevers and exhaustion.