1. Cut off one centimeter of the outer skin of aloe vera, apply the viscous liquid flesh on your face, wait until the mucus on your face dries, and then wash it off with water. Fresh aloe vera leaf juice contains a certain amount of calcium oxalate and a variety of plant proteins. 1. Cut off one centimeter of the outer skin of aloe vera, apply the viscous liquid flesh on your face, wait for the mucus on your face to dry, and then wash it off with water. Fresh aloe vera leaf juice contains a certain amount of calcium oxalate and a variety of plant proteins. Before use, you can do a skin test. The method is very simple. Apply aloe vera gel to soft areas on your upper arms or thighs before bed. If there are no abnormal skin symptoms the next morning, you can use it with confidence. If skin becomes red or spots appear, rinse with water. Never scratch it with your hands to prevent infection. People allergic to it should discontinue use. Before use, you can do a skin test. The method is very simple. Apply aloe vera gel to soft areas on your upper arms or thighs before bed. If there are no abnormal skin symptoms the next morning, you can use it with confidence. If skin becomes red or spots appear, rinse with water. Never scratch it with your hands to prevent infection. People allergic to it should discontinue use.