On whether it is appropriate to use glycolic acid after retinoic acid
for skin maintenance, both retinoic acid and glycolic acid are commonly used. However, after using retinoic acid, whether it can be followed by glycolic acid is sincerely related to the safety of the skin and cannot be ignored.

Retinoic acid can promote skin cell renewal, improve keratinization, and is often effective on acne, wrinkles and other diseases. However, its strong nature makes the skin prone to dry, desquamation and redness, which is a sign of skin irritation.

Glycolic acid is a fruit acid, which can dissolve the bonding between the stratum corneum, causing the stratum corneum to fall off, making the skin smooth and delicate, and can increase skin hydration, promote melanin metabolism, and brighten the skin tone.

If retinoic acid is followed by glycolic acid, both have the ability to exfoliate, and when used in combination, the skin will be irritated. The skin barrier is easily damaged, causing increased water loss, dryness, itching, tingling or even, and the risk of inflammation is also increased.

However, if the skin has adapted to retinoic acid and tolerated it well, after gradual adjustment, you can try a combination. First use low-concentration glycolic acid, try it on a small scale, and observe the skin's reaction. If there is no discomfort, then gradually expand the range and increase the frequency. In the meantime, it is necessary to take care of the skin, moisturize and protect the sun, and prevent damage.

In summary, the use of glycolic acid after retinoic acid must vary according to personal skin tolerance. Beginners should be cautious, consult a professional first, and follow the guidance to keep the skin safe.