I got a sunburn on my back 5 days ago...And it itches a lot!

find an aloe vera plant, take a leaf off and smear it, well, have someone smear it on your back, you will not believe how much it will help

cucumber is a good choice. Cut a cucumber into thin slices and put them in a fridge for a while, and then stick some on the allergic area. it's known that cucumber has the function of relief and sedation to the allergic skin, and at the same time its abundant vitamins are also very good to the skin. so i think you can have a try .

i have heard aloeverajuice is good for sunburn.try it out.you get in the chemist.

try a real good moisturing cream on it. if you can get someone to rub it on for u that will be even better,

Plain natural yogurt applied straight from the fridge to the affected area as required works very well