It takes a month to apply to the skin and more than a year to eat. Aloe fresh leaf juice contains a certain amount of calcium oxalate and a variety of plant proteins. Some patients have particularly sensitive skin. After rubbing fresh aloe leaves for external use, the skin feels itchy or has a small red rash, which is generally not too serious and will subside in half a day. The newly transplanted aloe polyphenols, aloin, aloe tincture, organic acids and other components are unstable, and it takes some time to use them. In addition, in case of skin allergy, fresh aloe leaf juice can be diluted with cold boiled water and then applied. Those with severe allergies should stop using it immediately. If you find a small rash or itching, you can wash it with warm water. Never scratch with your fingers to avoid scratching your skin and causing new infections.