Tea-coloured urine and dehydration

When the body loses fluid through sweating, diarrhoea, vomiting, or fever, the kidneys conserve water and urine becomes darker and stronger-smelling. Dehydration may also cause thirst, dry mouth, headache, dizziness, constipation, and passing urine less often.

Colour alone cannot confirm dehydration. Blood, medicines, foods, liver problems, a urinary tract infection, or kidney stones can also change urine. Cloudy urine, burning, side pain, fever, or visible blood makes another cause more concerning.

If you are alert and able to drink, take frequent small sips of water. After heavy sweating or fluid loss, an oral rehydration drink may replace water and salts more appropriately than plain water alone. Rest somewhere cool and note whether urine becomes lighter as you rehydrate.

Do not force large amounts quickly if you are vomiting. People with heart, kidney, or other fluid restrictions should ask a clinician how much to drink. Arrange assessment if the colour does not improve, keeps returning, or occurs without an obvious fluid loss.

Seek urgent care for confusion, fainting, severe weakness, inability to keep fluids down, very little urine, severe flank pain, fever with urinary symptoms, or blood in the urine. Heat exposure with worsening dizziness or collapse also needs prompt help.

Ask whether your symptoms fit dehydration, whether urine or blood tests are needed, which rehydration drink is suitable, and whether any medicine or existing condition could be changing your urine.