How are heat rashes caused in adults?

Adults develop heat rash primarily due to the combined effects of multiple factors. High-temperature environments or excessively hot weather can cause increased perspiration; if sweat gland ducts become blocked, sweat cannot be excreted in a timely manner, making it easier to develop heat rash. Wearing tight or non-breathable clothing also increases the risk of sweat gland blockage, which can lead to heat rash. Additionally, excessive exercise or physical labor causing significant sweating may also result in blocked sweat glands and subsequent heat rash. Furthermore, underlying conditions such as eczema, skin inflammation, or hormonal imbalances can cause abnormalities in the skin's sweating function, increasing the risk of developing heat rash. Therefore, adults should pay attention to maintaining clean and dry skin, wear loose and breathable clothing, and avoid excessive exercise and labor in high-temperature environments to reduce the occurrence of heat rash.