Blisters appear on the face after sunburn, probably because the skin is extremely short of water. After a day of exposure, my skin was sunburned and dehydrated. At this time, some very mild products should be used to debug skin fatigue and damage. If some high-concentration and high-efficiency products are used at this time, it is very likely that the skin will overreact and inexplicable bubbles will appear. This is actually because of a self-protection reaction of the skin epidermis, just like a piece of red iron coming out of the furnace and immediately inserted into cold water, which will overreact. In this case, you need to use some very gentle products to help the skin calm the skin, repair the damaged skin, moisturize and recuperate. It is very likely that the products that can be used at ordinary times should be stopped for a while, and then used after the skin is repaired for a period of time. So as not to cause skin damage. For blistered skin, special hydration is needed, involving toner, hydrating mask, emulsion and so on. At the same time, daily sun protection is very important and must not be ignored.