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Stay Hydrated

Why drinking enough water matters every day, and the early signs your body is short of fluid.

3 min read Reviewed by MediLink Clinical Review PanelLast reviewed 09 Sept 2026

Water carries nutrients around your body, helps your kidneys clear waste, keeps your temperature steady and helps your bowels work.

How much do I need? Most adults feel well on about 6 to 8 cups of clean water a day. You need more in hot weather, when working outdoors, when breastfeeding, and when you have fever, vomiting or diarrhoea.

Early signs of not enough fluid - Dark yellow urine, or passing urine less often - Dry mouth and lips - Headache and tiredness - Feeling dizzy when you stand up

Simple habits - Keep a covered container of clean water where you sit or work. - Drink a cup with every meal. - Use oral rehydration solution when you have diarrhoea. - Choose water instead of sweet drinks.

Children and older people lose fluid quickly and cannot always tell you they are thirsty, so offer drinks often.

When to seek help now

Get medical help straight away for chest pain, difficulty breathing, heavy bleeding, seizures, confusion, a stiff neck with fever, a high fever in a baby, or if you feel your life is in danger.

General health information — not a diagnosis or substitute for professional medical care.