When the rash covers a large area or if it becomes infected, it may become very uncomfortable. Heat rash may be prevented by resting in a cool place and allowing the skin to dry. In most cases, heat stress can be prevented or, at least, the risk of developing heat stress can be reduced. Engineering Controls A number of engineering controls can help reduce heat exposure. Wear loose-fitting, lightweight clothing, such as cotton, to allow sweat to evaporate.
Light colors absorb less heat than dark colors.
When working outside, wear a lightweight hat with a good brim to keep the sun off your head and face. Thirst is not a reliable sign that your body needs fluids. When doing heavy work, it is better to sip rather than gulp the liquids. If possible, heavy work should be scheduled during the cooler parts of the day. Otherwise, alternate heavy work in the heat with lighter work or work in cooler areas.