Glycolic acid toner to improve dull knee
Now there is a knee problem with dull skin, you can use glycolic acid toner to solve it. Glycolic acid has the ability to gently exfoliate, which can make the old exfoliation of the knee skin fall off, promote the rejuvenation of the new skin, and make the skin tone gradually even.

To use this water, first cleanse the knee skin and remove its dirt. Take an appropriate amount of glycolic acid toner on a cotton pad, wipe the knee gently, and move slowly and evenly, so that the toner covers the dull area. When you first use it, you may feel slightly prickly on the skin, which is a normal sign, caused by glycolic acid irritation of the skin. If the tingling is too much, you can suspend it and use it after the skin gets used to it.

Use this toner gradually. At first, you can use it every other day, and when the skin gets used to it, increase it to once a day. And you need to do a good job of sun protection after use, because the skin is more sensitive to ultraviolet rays after exfoliation. If there is no protection, it is easy to cause pigmentation, which will exacerbate the dullness.

If you insist on using glycolic acid toner for a long time and take proper protection, the dullness of the knees will gradually fade, and the skin will return to a bright and smooth state.