On the timing of using glycolic acid on the scalp before and after the shower
If you want to improve the protection of the scalp, those who use glycolic acid are often trapped in the application of medicine. Should it be before or after the shower? This is not a trivial reason, it is related to the application of medicine power, and whether it is effective or not.

First of all, use it before the shower. At this time, the scalp is still in a relatively dry and clean state, without too much oil and dirt to cover. Glycolic acid is applied, which can easily touch all parts of the scalp and quickly enter the hair follicles and stratum corneum. Its acidic nature can soften the cuticles, open the congestion of the hair follicles, and open the way for subsequent cleaning and nourishment. And at this time, the pores of the scalp are not enlarged due to hot water fumigation, and the glycolic acid remains on the surface of the scalp, which has a stable effect and avoids the risk of rapid dissipation of the drug power. However, there are also disadvantages. Glycolic acid is inherently irritating. When used on dry scalp, if there is no early soothing primer, or it causes scalp discomfort, such as tingling and redness.

If you use glycolic acid after showering, it is also reasonable. Hot water in the shower makes the pores of the scalp dilate and the blood circulation accelerates. Apply glycolic acid after bathing, which can easily penetrate into the deep layer of the scalp as the pores expand, strengthening the ability to exfoliate and promote metabolism. And after bathing, the scalp is infiltrated with warm water, and the stratum corneum has a high degree of hydration. When glycolic acid acts, it However, it is not all good. After the shower, the scalp is wet, the glycolic acid is diluted too quickly, and the time of staying on the scalp is short. If it is applied unevenly, the medicinal power in some areas will not be reached, which will affect the overall effect.

In short, the scalp uses glycolic acid, and there are advantages and disadvantages before and after the shower. Those who want to use it should check the nature of their own scalp. After the shower, they should use hydration to reduce irritation; those with strong tolerance can use it before the shower to obtain the effect of quick delivery of medicinal power. Weigh the advantages and disadvantages and use it cautiously to obtain a good method of scalp care.