When it comes to whether glycolic acid needs to be washed
to nourish the skin, it depends on the things used. Glycolic acid is often used in skin care. After use, it is doubtful whether it needs to be washed.

In other words, glycolic acid has unique properties. It can penetrate into the skin, promote keratin metabolism, rejuvenate the skin's luster, and make the skin smooth and shiny. If it is not washed after use, it can continue to exert its effect and nourish the skin for a long time. And if it is mild, it will not cause discomfort to the skin, so it does not need to be washed.

However, some people hold different opinions. Although glycolic acid is beneficial, it has a certain acidity. If left on the skin for a long time, or cause the skin's acid-base imbalance. Over time, the skin may appear sensitive, such as redness, itching, etc. And when used during the day, the skin is prone to dust, mixed with glycolic acid, or unfavorable to the health of the skin. Therefore, it should be washed after use to keep the skin clean and balanced.

Both are reasonable. If you want the long-lasting effect of glycolic acid, and the skin is well tolerated, you may not wash it. However, if the skin is sensitive, or afraid of the acid-base imbalance of the skin, it is appropriate to wash it after use. After all, whether to wash it after using glycolic acid depends on the quality and requirements of the individual skin.