Salicylic acid is a beta hydroxy acid used quite commonly for acne treatment. It acts by penetrating inside clogged pores and removing the dead skin cells and bacteria thereby reducing inflammation in acne. It also reduces oil secretion by the glands, hence reducing chance of blockage. Salicylic acid in small percentages – 2% SA can be incorporated in cleansers, toners and serums for regular use.

As for acne scars, salicylic acid acts as a keratolytic and exfoliates the upper damaged layer of skin, allowing new brighter skin to generate from the lower layers. This can lighten acne marks and improve mild acne scars. However, this needs a larger concentration – chemical peels with 15-30% salicylic acid with multiple sessions under medical supervision can help. Deeper and older scars do not respond to salicylic acid as they often need procedures like deeper peels, lasers, microneedling which can penetrate below the epidermis and stimulate collagen formation.
Though salicylic acid use has multiple benefits, be careful while introducing it in your skincare regimen. It can cause dryness, redness and irritation if not applied correctly. Using salicylic acid on dry, damaged skin with inadequate barrier can even cause burns and marks which creates new cosmetic problems. A good skincare regimen with moisturised skin and adequate sunprotection is essential. Use of other active products like retinoids should also be done cautiously with this acid as simultaneous use can increase irritation and dryness. Consult a dermatologist for best treatment of your acne scars and advice about using salicylic acid on your skin.