[header] How to reduce the redness of sunburn [title] Drink a lot of water. [step] Try to drink at least 10 full glasses of water each day for a week after your sunburn. This will help your body to re-hydrate which will, in turn, aid in the healing process. 
Drinking water while you are out in the sun will also help you to avoid heatstroke and other heat-related medical conditions. [substeps] At the same time, make sure to avoid consuming any alcohol during your recovery period.