aloe vere lotion on your back, lots of sunburn spray, asperin or tylenol will help out, but someone told me about this trick. It's too late for you to do it, but if your ever out in the sun all day and the first moment you come in from the sun, take an ICE COLD shower for about 10 minutes. This will stop the continual burning of the skin after you come out from the sun and therefore your sunburn wont be as bad.