Oatmeal
Oatmeal has been proven to be quite effective at reducing inflammation and itching. [4] This makes it a useful form of treatment for heat rash and other skin conditions.
One way to use oatmeal is to pour 1 or 2 cups of oatmeal into a warm bath, and then soak oatmeal in the warm bath for about 20 minutes. Ensure that the water is not too hot, so as to avoid further irritation of the skin.
Another way is to make oatmeal into a paste and apply it on the affected area of your skin. To make this paste, mix a few spoons of oatmeal with water. You can either mix it manually or blend it, till it forms a paste. Then apply it on the affected area. There are also soothing colloidal oatmeal available for sale in store or online. [5]