On how long glycolic acid stays on the scalp
If you want to know how long glycolic acid stays on the scalp, you must first understand the properties of glycolic acid and the signs of the scalp. Glycolic acid belongs to fruit acids and the like, and has the ability to exfoliate and promote metabolism. However, its properties are divided into strong and weak, and it can be used improperly, or it can hurt the scalp.

Scalp, a part of the human skin, although covered by hair, its thickness and sensitivity vary. Healthy scalp, the stratum corneum is solid and has the ability to protect it; while sensitive scalp, the stratum corneum or thin, easy to be invaded by foreign objects.

If glycolic acid is applied to the scalp, its stay time may vary when your mileage may vary. For those with healthy scalp and good tolerance, when using it for the first time, you can leave it for a few minutes, such as three to five minutes, to observe the scalp's response. If there is no abnormality, it can increase gradually, but it should not last for a long time, no more than fifteen minutes at most. If the cover is left for a long time, it may hurt the scalp, causing redness, swelling, itching and pain.

As for those with weak scalp sensitivity, use glycolic acid with caution. Use a very thin liquid first, and leave it for only one or two minutes, and observe the scalp reaction carefully. If there is any discomfort, wash it with water as soon as possible, and do not use it again. Or consult a doctor and do as he says.

In general, glycolic acid stays on the scalp for a long time and is indeterminate. It must be determined according to the quality and reaction of the scalp to protect the health of the scalp and avoid its injury.