Oatmeal is a great solution for sunburn pain relief. Just mix it with cold milk as a compress to soothe sunburned skin. Use soy milk, because it’s a natural anti-inflammatory that soothes the skin post-sun exposure. After you combine the oatmeal and milk, just put the paste on some gauze and apply gently to your sunburn. The oatmeal’s antioxidant and anti-inflammatory properties prevent itching as well. Apply the oatmeal-milk compress to the affected area for 20 minutes, two times a day.