Most low-strength salicylic acid you find in everyday face washes and spot treatments is considered low-risk in pregnancy, and this reflects guidance from bodies like ACOG and the American Academy of Dermatology (AAD). The caution is about strength and how it is used: high-concentration chemical peels and any oral salicylate use are the real concerns, not a rinse-off cleanser. When in doubt, a quick check with your provider settles it.
Salicylic acid is a beta-hydroxy acid (BHA) used to treat acne and unclog pores. It shows up in cleansers, toners, spot treatments and stronger in-clinic chemical peels, usually at strengths from under 1% up to 30%. It is chemically related to aspirin, which is why oral salicylates get more scrutiny in pregnancy than a dab of face wash.
ACOG lists over-the-counter topical products with salicylic acid at 2% or less among ingredients considered acceptable in pregnancy. The AAD's guidance treats low-strength topical use as unlikely to be harmful, while advising against routine use over large areas of the body because long-term safety data is limited. Both point away from high-strength peels (roughly 15-30%) and away from oral salicylates, which carry clearer risks. So low-strength topical use looks reassuring, but the evidence is thin enough to stay measured rather than call it fully proven safe.
Favour low-strength (around 2% or less), and rinse-off products like cleansers over leave-on treatments spread across large areas. Skip professional salicylic acid peels and any oral salicylate use unless your provider directs it. If you would rather sidestep it, azelaic acid and glycolic acid are commonly suggested pregnancy-friendly options for acne; ask your provider or dermatologist for a routine that fits your skin.