Does tretinoin cause purging? How long does it last?
Reviewed by the WeighedHealth Editorial Team against primary clinical sources — FDA labeling, peer-reviewed trials, and specialty-society guidelines.
Content current as of July 2026; updated when guidance or availability changes.
Yes, tretinoin (and other retinoids: adapalene, tazarotene) commonly cause an initial 'purge' — increased breakouts during weeks 2-6. This is microcomedones already forming below the skin surface coming к head faster than they would naturally. Purging differs from a true reaction: purging appears in your usual acne zones, looks like your usual acne types, and improves by week 6-8. A true reaction (allergy, irritation) appears in atypical areas (jawline, neck) and gets worse over weeks. Manage purging by starting low-and-slow (apply every third night for two weeks, then every other night), using a pea-sized amount, applying к dry skin, and following с a basic moisturizer. Don't stop early — quitting at week 4 resets the clock when you restart.
Related questions
How much does Curology cost?
Curology costs $39.95/month for the custom Rx formula bottle. Trial is free shipping-only ($4.95). Cleanser/moisturizer add-ons run $14-22 each. Cancel anytime free.
Curology vs Apostrophe: which is better?
Apostrophe uses only board-certified dermatologists and ships individual Rx tubes. Curology uses NPs/PAs and ships compounded blends. Complex skin: Apostrophe. Simple acne: Curology. Pricing comparable ($25-50/month).