What to look for in a moisturiser during an isotretinoin course
During an isotretinoin course the moisturiser people are commonly steered towards is the least interesting one available: fragrance-free, active-free, and richer than whatever they were using before. Occlusive textures matter more than clever ingredients here, and lips almost always need a plain ointment rather than a balm. Your prescriber knows what your skin is doing and should be the one consulted if dryness becomes painful or does not settle.
Read the label for what is missing
The useful question is not which hero ingredient a cream contains but what it has left out. Fragrance, essential oils, drying alcohols, acids, retinol and strong vitamin C are the usual things to avoid on skin behaving this way. That rules out a surprising share of the Korean shelf, because fragrance is common even in products marketed as gentle. Korean packaging carries a full 전성분 (jeonseongbun, 'full ingredient list'), so the information is there — you just have to look past the front of the box.
Texture beats cleverness
Skin that has become very dry generally responds better to something occlusive than to something sophisticated. Balms, ointments and heavy creams sit on the surface and slow water loss; a light gel essence evaporates and leaves you where you started. Korea's range of weights makes this easy to navigate — 크림 (keurim, cream) to 밤 (bam, balm) to sleeping packs used purely as an overnight occlusive. Applying while skin is still slightly damp after cleansing is a reliable improvement. Reapply during the day if your face is tight; there is no prize for restraint here.
Lips, eyes, nose and everywhere else
Lips are the near-universal complaint and a plain ointment used constantly outperforms every tinted or flavoured balm. Keep one in every bag, coat and bedside drawer, because the fix is frequency rather than product. The inside of the nose, the eyes and the body all dry out too, so an unscented body cream and a humidifier in a Korean winter do real work. Contact lens wearers often struggle. Anything painful, cracking, bleeding or affecting your vision goes to your doctor rather than into a shopping basket.
What to leave alone entirely
Exfoliants of every kind, cleansing brushes, sheet masks that sting, warming or tingling products, acid toners and anything marketed as resurfacing. A stinging product on this skin is not activating anything; it is telling you it does not belong. Sunscreen stays, since photosensitivity is commonly flagged during a course, and a comfortable formula matters more than a maximal one. Wait for the prescriber's word before reintroducing actives — including after the course finishes, when skin is often still not behaving as it did before.
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✍️ Written & reviewed by the KoreaPlus Editorial team — dermatologist-informed, cosmetic-science researched & source-cited. Last reviewed: 2026-08-23.
General educational information using cosmetic structure-function wording — not medical advice. Always patch-test new actives. © KoreaPlus.