2. Physical exertion
Even simple physical exertion could lead to the development of a heat rash. Whether you’re doing manual labor or getting a good workout in at the gym, any task that causes you to sweat heavily has the potential to lead to a prickly heat rash. Wearing looser clothes while working out could help you avoid the development of prickly heat rash. Some people even decide to go shirtless for this very purpose.
The rash will also fade if you cool the area, thus if you notice a prickly heat rash developing during your workout you should take a break and get some wind on the area to cool it down. Cooling it down slowly through wind is generally more advisable than using ice or water because gradual cooling has less potential to create other complications. Studies also show that showering daily can reduce the odds of developing a heat rash.