On the compatibility of glycolic acid and salicylic acid
The skin diseases often rely on acids for treatment. Glycolic acid and salicylic acid are both commonly used ingredients in skin care. However, whether the two can be used together is really related to the efficacy and skin safety, which cannot be ignored.

Glycolic acid is an alpha-hydroxy acid with small molecules, which can smooth the stratum corneum of the skin, promote keratinocyte renewal, peel off old keratin, and rejuvenate the skin. It can also increase skin hydration and make the skin delicate and smooth.

Salicylic acid, which is a beta-hydroxy acid, is fat-soluble, can penetrate deep into pores, clear oil, relieve hair follicle blockage, and is good at treating acne and other diseases. It also has anti-inflammatory properties and relieves skin redness, swelling and discomfort.

If the two are compatible, from a theoretical point of view, they may have complementary effects. Glycolic acid exfoliates exfoliation on the outside, salicylic acid clears oil and penetrates pores on the inside, and works together, or it is more effective for improving skin texture and treating acne.

However, there are also risks associated with the combination. Both have certain irritation, and the combination may cause skin irritation to intensify, causing skin redness, tingling, desquamation, etc. Especially for sensitive skin, more caution is required.

If you want to combine glycolic acid and salicylic acid, use a skin test first. Take a small amount of the product containing this half, apply it to the skin behind the ear or inside the forearm, and wait for 24-48 hours. If there is no discomfort, you can use it cautiously on the face. And the initial use, the concentration should be low, the frequency should be sparse, and when the skin adapts, then adjust the concentration and frequency.

In summary, the compatibility of glycolic acid and salicylic acid, when used properly, can be effective; if used inadvertently, it is easy to hurt the skin. Users should carefully observe the skin condition, weigh the pros and cons, and act prudently.