Let me just start by saying, I don't know the science behind why this works. My best guess is whatever opens the pores in you face, opens the pores in you skin allow them to breathe and heal.
Noxema! After you shower rub noxema face wash into your skin and leave on while you sleep. When you wake up in the morning your sunburn will be nearly gone and any pain you had will surely be gone. Quick, easy and relatively inexpensive.
Hope this tip comes in handy as the summer time approaches, well at least for those of us here in Southern Nevada.