If a cold bath is not practical at the moment, wrap a cold wet towel around the sunburned area. Also try wrapping a bag of frozen corn or peas in a towel and apply. Do not apply the frozen package directly to the skin. Dip a wash cloth or gauze in some milk and apply to the burn. The milk should be at room temperature or cool, but not refrigerator cold.
Milk is a great remedy for any kind of burn.
Boil some lettuce in water, then strain the water out and let it cool in the refrigerator. Apply to your skin with cotton balls or a towel. Certain chemicals in lettuce have been shown to provide relief from sunburn. Slice pieces of cucumber, potato, or apples and apply to the sunburn. These cool vegetables can help reduce inflammation.