Say no to aloe vera juice on your face: Although aloe vera products for beauty are not as popular as in previous years, there are still many women who are obsessed with aloe vera, and some people even have accidents due to insufficient understanding of aloe vera. . Ms. Ma has chloasma on her face. She heard that aloe vera can nourish the skin. She thought, wouldn’t it be convenient and economical to apply aloe vera juice directly on her face? So I bought a pot of aloe vera from the market and kept it. I cut off a little of the aloe vera every day and applied the juice directly to my face. But after doing this for a few days, not only did the stains on my face not get rid of, but large bright red rashes appeared with dense red rashes on them, so I had to go to the hospital for treatment. The doctor said that this is contact dermatitis caused by fresh aloe vera juice. The rash is considered a mild symptom. In severe cases, the eyes will be swollen like grapes and cannot be opened. There may also be a large number of blisters as big as soybeans and bleeding. Yellow water, burning pain all over the face. Contact dermatitis caused by fresh aloe vera juice is more common in patients with other allergic diseases. Fresh aloe vera juice contains aloin, resin and other chemical substances, which are called haptens in medicine. After fresh aloe vera juice is applied to the facial skin, it combines with epidermal proteins to form substances that can cause allergic reactions in the body, which is called total antigen in medicine. Whole antigen substances can change the activity of ordinary lymphocytes in the skin and convert ordinary lymphocytes into sensitized lymphocytes. Sensitized lymphocytes can release a variety of lymphokines. Such lymphokines can cause severe inflammatory reactions in human skin. Causes skin capillaries to dilate and large erythema appear. Generally speaking, the first time the skin comes into contact with fresh aloe vera juice, the process from the formation of whole antigens, sensitization of lymphocytes to the emergence of skin inflammatory reaction takes 4 to 5 days. If the skin comes into contact with fresh aloe vera juice for the second time, it usually takes 12 days. Onset will occur ~48 hours later. This is the reason why Miss Ma's rash appeared after a few days of application. It can be seen that fresh aloe vera juice cannot be applied directly to facial skin at will, especially for patients with other allergic diseases. For aloe vera to be used for beauty, bioengineering means must be used to separate the active ingredients and active substances in aloe vera, and only the products can be used after professional refining, screening, desensitization and other treatments. When professional beauty salons use fresh aloe vera for beauty treatments, they must also use an anti-allergic isolation solution. After 10 minutes of precipitation, the substances that are irritating to the skin are precipitated and filtered out, and the collagen above is used for skin care. Don't use aloe vera juice just for the sake of convenience and saving money, or even hurt your skin.