On the relationship between glycolic acid and underarm sweating
The theory of modern medicine in studying the skin is quite heavy on the use of glycolic acid. Or ask: glycolic acid is helpful for underarm sweating?

Glycolic acid belongs to alpha-hydroxy acids and has unique properties. Its molecules are small and can quickly penetrate the surface of the skin. In underarm skin, it can regulate the metabolism of keratin. For keratin, if it is out of order, the sweat glands may be disturbed, causing hyperhidrosis. Glycolic acid makes keratin cells shed regularly, the sweat glands open smoothly but not blocked, and the sweat excretion is orderly, or it can slow down the state of hyperhidrosis.

And glycolic acid has the ability to absorb moisture. The skin is hydrated but not dry. Sweating under the armpits, often due to local dampness, breeding bacteria, resulting in poor odor. Glycolic acid absorbs moisture, making the armpits dry, limiting the growth of bacteria, and reducing odor.

Then use glycolic acid on the armpits, be careful. The skin under the armpits is delicate, and glycolic acid has a certain irritation. It is advisable to try it on a small part before use to detect any discomfort, such as redness, swelling, tingling, etc. If the skin is sensitive, you should pay attention, or consult a doctor before using it.

To sum up, glycolic acid sweats under the armpits, theoretically or helpful, but in practice, your mileage may vary. Those who use it should be cautious according to their own skin shape, so as to seek benefits and avoid harm.