The short version
For washing your face, lukewarm water is a comfortable and sensible default for most people. It is warm enough to feel pleasant and help cleanser spread, without the extra drying and irritation that very hot water can bring. Cool or cold water is usually fine too, mainly as a matter of comfort. Temperatures at either extreme are where problems tend to start.
What hot water does
Hot water can feel relaxing and satisfying, and it is easy to assume it cleans better. But hot water also dissolves more of the skin’s natural oils, and it can leave the surface feeling drier and tighter than lukewarm water. In many people it also increases redness for a while, because heat makes blood vessels near the surface widen.
Typical effects of very hot water on the face include:
- a tight or dry feeling soon after washing;
- temporary redness or flushing;
- stinging when you apply products afterward;
- for people with conditions such as rosacea or eczema, a greater chance of a flare. If your face often flushes, the rosacea redness article describes common triggers more generally.
None of this means a single hot rinse will harm you. It is the repeated pattern, daily, that tends to matter, particularly when combined with a strong cleanser or firm scrubbing.
What cold water does
Cold water makes skin feel briefly refreshed and tight. Some people like a cool splash in the morning. Cold temperatures may temporarily reduce visible redness or puffiness by narrowing blood vessels, but the effect is short-lived.
Cold water is also not as good at helping some cleansers spread or dissolve oils and balms, so you may find the face feels less clean. For sensitive faces, very cold water can feel uncomfortable or even sting. Ice-cold water is not necessary, and there is no good evidence that it provides lasting benefits.
The pores myth
A common idea is that warm or hot water “opens” pores and cold water “closes” them. Pores are not muscles, so they do not open and close like doors. Warmth can soften oils and make them flow more easily, and cool water can make skin feel firmer for a moment, but neither changes pore size in a lasting way. Pore appearance is mostly influenced by things like genetics, oil production and age.
So there is no need to finish every wash with a freezing rinse, and no need to steam your face for a “deep clean”. Steaming can feel pleasant, but it can also irritate sensitive or flushed skin.
Showers are part of the story
Many people wash their face in the shower, where the water is hotter than they would use at a sink. A long, very hot shower can leave both face and body feeling dry. If you wash your face in the shower, try turning the water down a little or stepping out of the direct spray for that part. The broader topic of shower habits covers the rest of the body.
Water quality can matter too. In some areas, hard water leaves a film that makes skin feel dry or tight, and that effect can be mistaken for a temperature problem.
How to choose
A simple rule: use water that feels neutral on your wrist or the inside of your forearm, neither noticeably hot nor cold. On your face it should not make the skin pink or stingy.
Suggestions by situation:
- Dry or sensitive skin: stay lukewarm to cool, keep washes short, and avoid steam.
- Oily skin: lukewarm is still a good choice. Hot water will not remove oil without cost, and may leave the skin feeling stripped; the phrase stripped skin describes that tight sensation.
- After exercise: a cool or lukewarm rinse can feel good. Cooling down first before washing can help if your face is flushed.
- In winter: the air is drier, so skin may be less tolerant of heat. This is a time to be especially careful about hot water.
Signs the temperature is a problem
Consider lowering the heat if your face:
- looks pink right after washing and stays that way for a while;
- feels tight or itchy within minutes of drying;
- stings when you apply a moisturizer you normally tolerate.
Other causes are possible, such as a harsh cleanser or too much exfoliation, so look at the whole routine. Changing the water temperature is an easy first test because it costs nothing, but it is not a cure for everything.
When to get help
If redness, burning or dryness persists even after you switch to lukewarm water and a gentle routine, or if you notice cracking, swelling or pain, it is worth checking in with a qualified health professional. Ongoing flushing in particular is something a doctor or dermatologist can assess.