Exposure to the sun has a terrible damaging effect on the skin, and the face is one of the most exposed areas of the body. In order to protect the skin, you need to use a commercially produced sunblock with a sun protection factor (SPF) of at least 15. Use a waterproof sunblock, or reapply after swimming.
To soothe mild sunburn, gently spread one of the following over the affected area: mashed cucumber, plain yogurt, grated raw potato, cotton balls soaked n milk or 1 egg white beaten with 10ml witch hazel and 10ml honey, then rinse off with lukewarm water and pat dry. Take care not to rub the skin when drying it. Gently apply rich moisturizing cream to the burnt area.