Winter creates a specific kind of dryness that summer routines can’t fix. Cold air outside holds almost no moisture; heated air inside strips what little remains. The skin barrier is under sustained attack from both directions, which is why even people who don’t normally struggle with dry skin find themselves reaching for heavier products between November and March.

The adjustment for winter isn’t about switching everything — it’s about upgrading texture and adding one sealing step. If you use a lotion in summer, switch to a cream or butter. If you use a cream, add an oil underneath it. The goal is an extra layer of occlusion that keeps moisture from evaporating throughout the day in dry indoor air.

Humidifier use is underrated skincare. Running a humidifier in your bedroom at night adds ambient moisture to the air and reduces transepidermal water loss while you sleep — the same mechanism that makes overnight body care work so well in winter. It’s one of the most effective dry skin interventions that has nothing to do with what you apply.