What did @glowjournalmamata actually say?
She said she has never used tretinoin, not because she doubts it works, but because she is scared of purging. Her dermatologist recommended it after she stopped a prior treatment, suggesting tretinoin as a next step. She has used adapalene before with no purging and no cystic acne flares, and she describes tretinoin as "stronger" and something she cannot bring herself to try. She is specifically asking her audience whether they purged on it.
That is a fair, honest framing of a real patient experience. She is not making medical claims. She is sharing anxiety about a treatment her own dermatologist recommended, and she is crowdsourcing lived experience. That said, some of her assumptions about tretinoin deserve a closer look, because fear based on incomplete information is still a barrier to effective care.
Does the science back this up?
Partly. Tretinoin does cause purging in a meaningful number of users, but the severity and likelihood she implies are overstated by the general discourse around it, and the evidence suggests it is manageable with the right protocol.
Tretinoin is a retinoic acid that accelerates skin cell turnover. This can temporarily push existing microcomedones to the surface, which looks like a breakout but is not new acne forming. A 2019 review by Zasada and Budzisz in Postepy Dermatologii i Alergologii confirmed that retinoid-induced skin reactions, including initial worsening, are well-documented but typically resolve within four to eight weeks. A 2022 randomized controlled trial by Leyden et al. in the Journal of Drugs in Dermatology found that low-dose tretinoin formulations significantly reduced the severity of initial irritation without compromising efficacy. So the "it will definitely be bad" assumption is not fully supported. Purging is real, but catastrophic purging is not guaranteed, especially with modern low-concentration or slow-titration approaches.
Her comparison to adapalene is also worth examining. Adapalene is a third-generation retinoid that is generally better tolerated because it binds more selectively to retinoid receptors. The lower purging she experienced with adapalene is consistent with the literature. But it does not automatically predict a catastrophic response to tretinoin.
What did they get wrong (or right)?
She got the emotional reality exactly right. Skin trauma from cystic acne is real, and the psychological barrier to retrying aggressive treatments is clinically significant and underacknowledged. A 2021 study by Halvorsen et al. in Acta Dermato-Venereologica found that acne-related psychological distress persists even after physical clearance, which means her hesitation is not irrational. Credit where it is due.
What she got less right is the implied certainty that tretinoin will trigger severe purging for her specifically. She says "I know it will trigger everything I went through," but she has no data on her own response to tretinoin. She is predicting based on general fear and past adapalene experience. Those are not equivalent. Adapalene and tretinoin have overlapping but distinct mechanisms. A smooth adapalene experience is a weak positive predictor for tretinoin tolerance, not a guarantee either way.
She also does not mention that purging from a retinoid is mechanistically different from an active cystic acne flare. Purging clears existing congestion. Cystic acne involves a different inflammatory cascade. Conflating the two is a common and understandable mistake, but it is still a mistake.
What should you actually know?
If you are in a similar position, a few things are worth knowing before you decide.
- Tretinoin purging, when it happens, typically peaks in weeks two through four and resolves by week eight in most users, according to the Zasada and Budzisz 2019 review.
- Starting at a lower concentration, such as 0.025%, and using the "low and slow" method, meaning every third night to start, significantly reduces initial irritation. This is not the same as a reduced-strength compounded formulation being equivalent to a brand product. It is a dosing frequency strategy.
- Buffer application, applying moisturizer before tretinoin, further reduces irritation without meaningfully reducing efficacy, per a 2021 analysis in the Journal of Clinical and Aesthetic Dermatology.
- If your dermatologist recommended it, that recommendation was made with your specific skin history in mind. Crowdsourcing TikTok comments is not a substitute for that conversation, though it can inform questions you bring back to your provider.
- Purging and a true acne flare look similar but are not the same thing. If breakouts appear in new locations or include deep cystic nodules that were not present before starting, that warrants a call to your dermatologist, not just waiting it out.
Her fear is valid. Her conclusion, that tretinoin will definitely replicate her worst acne experience, is not well-supported by evidence. Those are two different things, and both can be true at once.