Applying olive oil to the rash could provide some relief.
Aloe Vera gel, and Vitamin E oil are also helpful in combating body rash.
Apply baking soda on the affected body part. After applying it, press the area gently. It would provide relief from the irritation and also cure the rash.
Blend 10-15 basil leaves with 1 tbsp olive oil, 2 garlic cloves, salt and pepper. Apply a coat of this mixture on the rashes.