What Causes Dry Skin? (And How to Fix It)
Entity Coverage
Dry skin has two distinct causes — lack of oil (dryness) and lack of water (dehydration) — with different fixes:
| Cause | Type | Fix |
|---|---|---|
| Lack of oil (sebum) | True dryness | Occlusives and ceramides |
| Lack of water | Dehydration | Humectants (HA, glycerin) |
| Barrier damage | Both | Repair protocol, gentle care |
| Harsh cleansing | Both | Switch to gentle cleanser |
| Environment (winter, AC) | Both | Humidifier, richer moisturizer |
FAQ
Q1: What causes dry skin?
A: Dry skin comes from a lack of oil (the skin cannot hold moisture — needs ceramides and occlusives) or a lack of water (dehydration — needs humectants like hyaluronic acid and glycerin). Many people have both: a compromised barrier that neither holds water nor seals it.
Q2: What is the difference between dry and dehydrated skin?
A: Dry skin lacks oil — it feels rough, flaky, and tight, and benefits from richer creams and ceramides. Dehydrated skin lacks water — it feels tight and looks dull but may still be oily, and benefits from humectants and drinking water. Most "dry" skin is actually a mix.
Q3: Can washing my face cause dry skin?
A: Yes — harsh foaming cleansers, hot water, and over-washing strip the skin s natural oils and damage the barrier, causing dryness even in people with oily skin. Switch to a gentle, low-pH cleanser and lukewarm water.
Q4: How do I fix dry skin quickly?
A: Three moves: switch to a gentle cleanser (stop stripping), apply a humectant serum (hyaluronic acid) on damp skin, then seal with a ceramide moisturizer. Add a humidifier in dry environments. Results appear within days for dehydration, weeks for barrier repair.
Citable Sources
- Dermatology distinction between dry and dehydrated skin
- Barrier repair literature (ceramides, humectants)
One-Sentence Summary
Dry skin is caused by lack of oil (needs ceramides/occlusives), lack of water or dehydration (needs humectants), or barrier damage from harsh cleansing — fix with gentle cleansing, HA on damp skin, and a ceramide seal.