Can dehydration cause skin issues?

How can you tell whether dehydration is involved?

Body dehydration happens when you lose more fluid than you take in. Dry skin is one possible symptom in adults. Look for other signs too: strong thirst, a dry mouth, dark urine, urinating less, tiredness or dizziness. Vomiting, diarrhea, fever, heavy sweating and not drinking enough can all cause dehydration.1

Skin turgor means the skin's ability to change shape and return to normal. With fluid loss, pinched skin can take longer to flatten again. Skin that stays tented or returns very slowly needs prompt medical attention. Reduced elasticity can also have causes unrelated to body fluid levels, including connective tissue disorders, so a pinch test alone should not decide what is wrong.2

Will drinking more water improve your skin?

Extra water has limited evidence for improving skin hydration, which is a smaller job description than the beauty industry tends to give it. Small studies link increased water intake with better skin hydration and less dryness, but the size of the practical benefit remains uncertain.4

In a study of 49 healthy women aged 22 to 34, adding water to the usual diet over four weeks improved measured skin hydration, particularly among those with lower usual water intake. That makes adequate drinking a sensible starting point, not a reason to expect extra water to fix every skin concern.5

What should you do first?

1. 1Replace lost fluids. For mild dehydration, drinking water can be enough. If nausea makes drinking difficult, start with small sips and gradually drink more.
2. 2Replace salts as well when needed. Vomiting and diarrhea can remove sugar, salts and minerals along with water. Ask a pharmacist about an oral rehydration solution for you or your child.
3. 3Address dry skin directly. Apply moisturizer right after showering while skin is still damp, then use it at least twice a day. Choose a cream or ointment for dry skin.
4. 4Stop exfoliating dry, peeling skin. Use a fragrance free cleanser or moisturizing body wash, and avoid fragranced products that can irritate dry skin.

Moisturizer helps keep water in the skin, rather than asking your drinking glass to handle the entire department. Creams and ointments hold moisture better than lotions. If only some areas are dry, moisturize those areas rather than automatically applying a thick product everywhere.7

How long should dryness take to improve?

Dry skin often improves within two weeks when home care addresses the cause. If dryness continues or worsens, see a dermatologist rather than simply increasing your water intake. Painful, cracked, bleeding, stinging or very irritated skin also deserves assessment; you could need prescription treatment.37

Who needs to be more careful?

Babies, young children and older adults are more vulnerable to dehydration. Older adults can lose some sense of thirst. Medicines and illnesses that increase urination or sweating also raise the risk, as does exercising or working outdoors in hot weather. Drink regularly through the day and increase fluids when sweating or ill; pale urine is a useful hydration target.16

When does dehydration need urgent help?

Get urgent medical advice if dizziness on standing persists, urine becomes dark or less frequent, or a child has fewer wet diapers or few tears. Confusion, fainting, no urination, difficulty breathing or being difficult to wake require immediate medical help. Also seek prompt care if skin stays tented or you cannot increase fluid intake because of vomiting.126