On the Safety of Glycolic Acid for Scalp
Glycolic acid is widely known in the field of skin care. However, it is used on the scalp, and its safety needs to be carefully investigated.

Glycolic acid belongs to fruit acid and the like. It has the ability to exfoliate, which can make the old keratin on the surface of the skin fall off and rejuvenate the skin. For ordinary skin, it is used properly and is quite beneficial. However, the skin of the scalp is different from other skin such as the face and neck. On the scalp, the hair is overgrown and the sebaceous glands are secreted vigorously, and its physiological environment is very unique.

If glycolic acid is used on the scalp rashly, there may be many risks. First, the stratum corneum of the scalp is thin and rich in nerve endings. The acidity of glycolic acid may irritate the scalp, causing itching, tingling, and even allergies. The scalp is red and swollen, rash, and disturbing. Second, the microecological environment of the scalp is delicately balanced, and the application of glycolic acid may break this balance. There are beneficial bacteria on the scalp, which can protect the scalp's health. Glycolic acid may damage the beneficial bacteria, causing the growth of harmful bacteria and causing scalp diseases, such as seborrheic dermatitis.

However, if used with caution, it is not absolutely feasible. Before using glycolic acid on the scalp, test the skin first. Take a small amount of glycolic acid products and apply them to a hidden place on the scalp, such as behind the ear and near the scalp. Wait for several hours or even a day to see if there is any discomfort. If there is no abnormality, it can be used. When using, the concentration should be low, and do not use high concentrations to prevent damage to the scalp. The frequency of use should also be sparse and not dense, and the cycle should be determined according to the tolerance of the scalp.

In short, glycolic acid is used on the scalp. Whether it is safe or not depends on the method of use and individual differences. Users should act with caution and take care of the health of the scalp. If it is used improperly, although seeking the effect of hairdressing, it will lead to scalp diseases, and it will be too late to regret.