Should I apply salicylic acid to damp or dry skin?

What should I do after washing?

Check the skin preparation instructions before applying a salicylic acid treatment. For a wash, follow its cleansing directions; for a product you leave on, follow its application directions. If the label does not explain whether your skin should be damp or dry, ask a pharmacist about that product rather than borrowing instructions from another acne medicine.14

How to start a salicylic acid acne treatment

1. 1Test a small amount on one or two small treatment areas for three days. If there is no reaction or discomfort, proceed with the product's directions.
2. 2Cleanse gently. When drying your skin, pat with a clean towel rather than rubbing, especially if your skin is already dry.
3. 3For acne medication that you leave on, apply a thin layer across the affected acne prone area, rather than treating only individual spots. Follow the product's directions for the amount.

Why is moisturizer applied to damp skin?

Moisturizer helps trap moisture when applied to skin that is still damp after bathing. That is general dry skin care, not an instruction to wet your face before applying salicylic acid. Moisturizer and salicylic acid have different jobs, despite being routinely assigned the same bathroom instructions. For dry skin, choose a fragrance free moisturizer; creams and ointments provide more moisture than lotions. Wear broad spectrum sunscreen with SPF 30 or higher during the day.26

How often should I use salicylic acid?

Use the frequency on your package or prescription label, not a universal morning or evening schedule. Start less often if needed, then increase as your skin adjusts without exceeding the directions. Salicylic acid can dry or irritate skin, and reducing daily use can help when winter dryness becomes a problem. Do not add extra exfoliation to tackle the resulting flakes: exfoliating too much can remove moisture and oils, making skin itchier and drier.16

What results should I expect?

Salicylic acid unclogs pores and exfoliates skin, making it particularly useful for blackheads and whiteheads. It is a beta hydroxy acid, or BHA: an acid that dissolves in oil and helps remove pore clogging oils and dead skin. For general acne treatment, fewer breakouts can appear in four to eight weeks, with clearing taking around 16 weeks if the treatment works for you. Give one acne treatment six to eight weeks without adding another. Large, deep, painful pimples or acne that leaves scars need a dermatologist rather than more experimentation with skin dampness.35

When should I be careful or stop?

If you use adapalene, avoid adding salicylic acid unless your prescriber approves the combination: the drying and irritating effects can add up. Check with your clinician before combining salicylic acid with benzoyl peroxide or tretinoin. If you are pregnant, trying to become pregnant or breastfeeding, discuss salicylic acid with your doctor before starting.147

Do not apply salicylic acid to broken, red, swollen, irritated or infected skin. Tell your doctor about severe or persistent stinging or irritation. Stop using it and seek immediate medical help for hives, throat tightness, breathing difficulty, faintness or swelling of the eyes, face, lips or tongue.14