On the disadvantages of glycolic acid
Glycolic acid is gradually useful in the genus of daily use and medical beauty care. However, it also has various drawbacks, which cannot be ignored.

First, glycolic acid is strong. It is quite corrosive, and those who use it with delicate skin are prone to irritation. That is, when ordinary people use products containing glycolic acid, the skin may feel tight and tingling at first, and even erythema and itching. If the concentration is slightly high, or used too frequently, the skin barrier will be damaged, resulting in water loss, desquamation, and sensitization.

Second, after using glycolic acid, the skin's sensitivity to light increases greatly. Exposure to sunlight can easily cause sunburn and exacerbate pigmentation. If not properly protected, diseases such as pigmentation and dullness are prone to occur, and the speed of skin aging also increases. In the long run, the appearance of premature aging of the skin will gradually appear, wrinkles will occur, and elasticity will be lost.

Third, glycolic acid is also unfavorable for those who apply it to hair. Although it can be temporarily removed, it can be used repeatedly, and the hair follicles are easily damaged. Hair regeneration is abnormal, or the hair becomes thicker, denser, and the growth is disordered. What's more, follicle inflammation occurs frequently, redness and pain, and hair will fall off after a long time, which affects the appearance.

Fourth, some individuals are allergic to glycolic acid. Mild cases, only local skin discomfort; severe cases, allergic reactions to the whole body, such as shortness of breath, dizziness, endangering life. Therefore, before using products containing glycolic acid, a skin test is indispensable, and it is difficult to guarantee that the skin test will be foolproof.

To sum up, although glycolic acid has its uses, there are also drawbacks. Those who use it should carefully weigh, according to the state of their own skin and hair, choose the appropriate method and degree, and take care of it after use, and strictly use sun protection to ensure healthy skin and hair.