Sunburned scalp

I was just in a professional beauty supply store yesterday, and Nioxin also makes a spf scalp protector! It's in a yellow can with a red top. It was $7 or $8 there, and retail is usually 30-50% more, but it's spf 25, so it should help!
 
I think Kerastase have a product that has spf in it that you can spray on. If its really bad he can soothe it with some yogurt on - does wonders to also kill the redness.