Salicylic acid is an oil-soluble exfoliant (a BHA) that gets inside the pore to clear blackheads and oily acne. It's effective at 0.5–2%, but it's an active — expect some dryness, introduce it slowly, and always wear sunscreen.
Salicylic acid is effective but is an active — most side effects come from using too much, too often.
| Reported effect | How often | Notes |
|---|---|---|
| Skin dryness and peeling | Common | Often dose-dependent; more likely with frequent use or higher concentrations |
| Mild stinging, burning, or irritation | Common | Usually transient and seen during initial use |
| Redness and flaking | Uncommon | More likely on sensitive or compromised skin barriers |
| Contact dermatitis or allergic reaction | Rare | Discontinue if persistent rash or swelling occurs |
| Salicylate toxicity (systemic absorption) | Very rare | Reported with extensive application over large body areas or high concentrations, not typical facial use |
Frequencies describe how often effects are reported in the literature for typical cosmetic use — not a guarantee for your skin. Patch-test a new active, and stop if irritation persists.
0.5–2% (2% is the OTC max)
2–3 nights/week, build up
Niacinamide, a light moisturiser
Sunscreen the next morning