Sweat (Miliaria) the retention of sweat as a result of blockage of the pores of the secretory sweat glands, causes a rash that is common in hot, humid climates, such as the tropics and during the hot summer months in temperate climates.
The best treatment for heat rash is prevention.
Avoid situations that lead to excessive sweating. If you already have the rash, keep the affected area cool and dry and it is likely that the problem will go away on its own within a few days.
Clean the area with a mild soap and pat dry (avoid rubbing).
Indoor air conditioning can help. In addition, avoid antiperspirants, creams, insect repellents or powders if you are still sweating. Sweating in babies is also treated with chamomile or black tea patches which have antiseptic and anti-inflammatory properties.