Hey, I live in the southern United States, we are experts at treating sunburn down here

. Here are some common home remedies that do work:
1. take a cool bath with 2-3 cups white or apple cider vinegar added, soak 30 minutes
2. soak small towels in vinegar and apply directly to sunburn
3. the tannic acid in tea also seems to help. Steep a large pot of very strong tea using 4-6 tea bags, cool in fridge, soak some small towels in the tea and apply to burned area (it will stain the towels, so use old ones)
4. apply milk to area or better yet soak in a bath with cool water to which you have added a gallon of milk, soak for 30 minutes
5. aloe vera
6. a cool bath with 2 cups of oatmeal added and soak for 30 minutes
7. a cool bath to which 1-2 cups baking soda has been added, soak for 30 minutes
8. grate cucumber and mix with milk and apply to burned areas