It's summer now and the sun in some regions of the world is really dangerous especially around the midday hours.So you can get a sunburn really quick.
Always make sure to seek medical help if your sunburn appears along with blisters or extreme pain.
First cool your sunburn down with water(a little below body temp,you shouldn't feel cold)
Mix plain yogurt with a few drops of vinegar an optional Vitamin E oil,lavender oil or a tiny dash of baking soda.
Simple yogurt +vinegar works just fine,the other ingredients are just a way of speeding up the healing process and hydration/relief.Apply on the burned area in a thick layer
Remove in the shower once the yogurt becomes tacky.