1) Aloe Vera
Heat rash or prickly heat rash is a very uncomfortable condition. My home remedy for heat rash is to apply aloe vera gel to the area that is enflamed. I also wear very loose clothing and try to allow my skin to breathe.
 
2) Corn Starch
When you end up with heat rash the first thing you are going to want to do is soothe the rash area. My natural heat rash home remedy is to use corn starch or baby powder over the affected area. This reduces the moisture that agitates the rash and also soothes the pain.
 
3) Avoid Creams and Lotions
Avoiding the use of heavy creams and ointments while you are experiencing a heat rash is my best home remedy idea for treating heat rash. Ointments and creams will tend to block the pores making the rash even more flared up.

Corn Starch

4) Light Clothing
When my children end up with heat rash I make certain that they are dressed in light cotton based clothing that breathes so that the rash can heal properly. A natural remedy for heat rash is wearing clothing that fits loosely and breathes easy.

5) Yellow Dock Root
Take a handful of minced yellow dock root and boil for ten full minutes. Strain the yellow dock and then take the cooled liquid and apply to the heat rash throughout the day. This natural home remedy is very helpful for heat rash. Some people have skin that is too sensitive for yellow dock so if you notice your skin becoming irritated discontinue the use.

6) Jewelweed Home Remedy 
My friends and I go on long hikes and sometimes in the summer months we end up with a heat rash depending upon how hot the weather is. A natural home remedy for heat rash when you are out in the wild is called Jewelweed, or Touch-me-not. This plant is usually found in low lying areas near water. If you take a few leaves and crush it in your hand you can gently place it on the heat rash and you will have immediate relief!

7) Lavender or Peppermint Oil
A home remedy for heat rash that is very natural and soothing is essential oil. Lavender and peppermint oil has a cooling effect on skin and will help to reduce the painful prickly heat rash irritation. You can either take the oil or apply it directly to the skin or what I prefer is to make a nice bath and infuse the bath water with these oils.

8) Mild Soap
Many people experience heat rash at some point in their lives. My natural remedy for heat rash is to make certain you use mild soaps and take cool showers to help heal the rash. Use a light aloe vera gel to ease the irritation but make sure you avoid heavy ointments which will only clog your pores.