On whether glycolic acid should be left on the face overnight
Glycolic acid is used for skin care. However, people are often confused, can it be left on the face overnight?

According to the principle of watching the skin, the outermost epidermis is the stratum corneum, which acts as a barrier to protect the skin from foreign objects. Glycolic acid is a type of fruit acid, which has the ability to exfoliate, which can make keratinocytes stick and loosen and promote their renewal. If used in moderation, it can make the skin smooth, uniform in color, and help other skin care ingredients enter the skin.

If glycolic acid is left on the face overnight, there are advantages and disadvantages. Those who are beneficial, the skin has strong metabolism at night, glycol acid can perform its work for a long time, promote keratin renewal, and have a better effect on acne, dullness, etc. And there is no external disturbance such as sun exposure at night, and the skin can be specially repaired.

However, the disadvantages are also obvious. Glycol acid has a certain degree of irritation, leaving it on the face for too long, or causing the skin to be intolerant. In light cases, the skin feels tight and itchy; in severe cases, it can become red, desquamation, and even damage the barrier. Those with sensitive skin should be especially careful. If the skin is thin and tender, or there is a history of allergies, rashly leaving glycol acid overnight may cause discomfort.

If you want to leave glycol acid on the face overnight, test the sensitivity first. Take a small amount and apply it behind the ear or under the chin. If there is no abnormality, it can be used on the face in a small area, and the frequency of initial use should be low, such as once a week, and then gradually increase. When the moisturizing is complete, you can apply the moisturizing essence as a base to reduce its irritation.

In short, leaving glycolic acid on the face overnight is feasible for tolerating the skin, and it needs to be done carefully according to your own skin type to protect the effect of skin care without the risk of skin damage.