What the research shows about water and acne
Drinking more water does not directly cure acne, but staying hydrated may help your skin function better. The evidence is mixed: some studies suggest that dehydration can make acne worse by thickening sebum (the oil your skin produces) and reducing your skin's ability to shed dead cells, but no major clinical trial has shown that increasing water intake alone clears acne in people who already drink normally.
The confusion often comes from conflating two different things. Your skin needs adequate hydration to work properly—that is true. But "adequate" for most people means drinking enough that you are not thirsty and your urine is pale, not drinking extra water beyond that point. Drinking eight glasses a day, a common recommendation, is not based on acne research and is not necessary for most people.
What matters more is what you are drinking instead of. If you replace sugary drinks or high-dairy beverages with water, that change alone might improve acne, because both sugar and dairy have been linked to breakouts in some people. The water itself is not the active ingredient—the removal of something else is.
Key Takeaways
- Staying normally hydrated supports skin function, but drinking extra water beyond your body's actual needs does not treat acne.
- The research linking water intake to acne improvement is weak; most studies show that dehydration makes acne worse, not that extra hydration clears it.
- Replacing sugary drinks or milk-based beverages with water may help acne, but the benefit comes from removing those drinks, not from the water itself.
- Skin hydration and body hydration are related but separate—moisturizing your skin topically is a different step from drinking water.
How dehydration affects your skin
When your body is dehydrated, your skin becomes less able to regulate oil production and shed dead cells efficiently. Dehydrated skin can trigger your sebaceous glands to produce more oil to compensate, which can clog pores and worsen acne. This is the mechanism behind the claim that water helps acne—but it applies only to people who are actually dehydrated.
The problem is that most people in developed countries who have acne are not chronically dehydrated. They drink coffee, tea, juice, soda, or milk throughout the day. For them, drinking additional water on top of what they already consume will not produce a noticeable change in acne because their skin is already adequately hydrated.
If you are genuinely dehydrated—thirsty, dark urine, dry mouth—then yes, drinking water will help your skin function better. But that is treating dehydration, not treating acne specifically.
Water versus topical moisturizers for acne-prone skin
Drinking water and using a moisturizer are two separate things, and acne-prone skin needs both. Drinking water hydrates your body from the inside; a moisturizer hydrates your skin from the outside. They work on different layers and through different mechanisms.
Many people with acne skip moisturizer because they think it will make breakouts worse. In reality, acne treatments like benzoyl peroxide and retinoids dry out skin, and dry skin can trigger more oil production and irritation. A lightweight, non-comedogenic moisturizer (one that does not clog pores) is usually necessary when you are using acne medication, regardless of how much water you drink.
If you are treating acne, focus on the moisturizer first—that is where the evidence is strongest. Water intake matters for overall health, but it is not a substitute for topical skin care.
What actually changes acne: diet and lifestyle factors
The strongest evidence for non-medication acne improvement points to diet and lifestyle, not water intake alone. High-glycemic foods (white bread, sugary drinks, processed snacks) have been linked to acne in multiple studies. Dairy, particularly skim milk, has also been associated with breakouts in some people. Stress and poor sleep can worsen acne by increasing inflammation and cortisol.
If you are drinking sugary sodas or energy drinks and switching to water, that change may improve your acne—but the benefit comes from removing sugar, not from the water itself. Similarly, if you drink a lot of milk and switch to water, the improvement comes from reducing dairy. The water is simply what you are replacing those drinks with.
Hormonal changes, genetics, and bacterial colonization of pores drive acne far more than hydration status does. This is why acne medications (like benzoyl peroxide, salicylic acid, or prescription retinoids) work: they address the underlying causes, not just the symptoms.
How much water do you actually need
There is no universal amount of water that works for everyone. Your needs depend on your body size, activity level, climate, and overall diet. A practical guideline: drink enough that you are not thirsty and your urine is pale yellow. If you are exercising, in a hot climate, or pregnant or breastfeeding, you will need more.
The "eight glasses a day" rule is a myth without strong scientific backing. Some people need more, some need less. Thirst is a reliable signal for most healthy adults, though it becomes less reliable as you age.
If you are already drinking water regularly and your urine is not dark, drinking more water will not improve your acne. You have already met your hydration needs.
When to see a dermatologist instead of relying on water
If you have acne that is not improving after two to three months of basic skin care (cleansing, moisturizing, and sun protection), or if you have painful cystic acne, see a dermatologist. No amount of water will treat moderate to severe acne. Dermatologists can prescribe medications like benzoyl peroxide, retinoids, antibiotics, or isotretinoin (for severe cases) that actually address the causes of acne.
Drinking water is good for your overall health and may support skin function, but it is not acne treatment. It is a baseline health habit, not a substitute for proven acne therapies.
Frequently Asked Questions
Can drinking water reduce oily skin?
Paradoxically, dehydration can make skin oilier because your skin compensates by producing more sebum. Staying normally hydrated helps regulate oil production. But if your skin is already oily and you are drinking adequate water, drinking more will not reduce oiliness further. Oily skin is usually driven by genetics and hormones, not dehydration.
Does water help acne scars?
No. Water does not affect acne scars. Scars are structural damage to the skin that require dermatological treatments like laser therapy, microneedling, or chemical peels. Hydration supports skin health but cannot reverse scarring.
What if I drink a lot of water and my acne is still bad?
Acne is caused by bacteria, excess oil, dead skin cells, and clogged pores—not by dehydration. If water alone is not helping, your acne likely needs medication. Talk to a dermatologist about benzoyl peroxide, salicylic acid, retinoids, or prescription options.
Is tap water or filtered water better for acne?
For drinking, tap water and filtered water are equally fine for acne. The difference is negligible. If you are washing your face, very hard tap water (high in minerals) can sometimes irritate skin, but that is a separate issue from drinking water.
Does coconut water or electrolyte water help acne more than plain water?
No. Coconut water and electrolyte drinks are not superior to plain water for acne. Some electrolyte drinks contain added sugar, which may worsen acne. Plain water is sufficient for hydration.