Dark Brown Urine: What It Can Mean

Dark brown urine can result from concentrated urine, food or medicines, blood, or liver and muscle problems, so persistent change needs medical assessment. Colour alone cannot identify the cause. Think about fluid intake, recent exercise, new medicines, and whether the urine is clear, cloudy, reddish, or tea-coloured.

Dehydration can make urine darker and stronger-smelling, especially after sweating, diarrhoea, or vomiting. Heat exhaustion may occur with heavy sweating, weakness, dizziness, headache, or nausea. Brown or tea-coloured urine with yellowing of the eyes, pale stools, nausea, or upper abdominal discomfort can occur with liver inflammation such as hepatitis A or hepatitis B. Muscle injury after strenuous activity can also darken urine. Blood or urinary infection is another possibility, particularly with pain, urgency, or fever.

If you otherwise feel well, note the colour, timing, recent foods, medicines, exercise, and fluid intake. Drink fluids normally unless a clinician has advised restriction, and check whether the colour lightens. Do not stop prescribed medicine without advice. Arrange a medical review if the change persists, returns, or has no clear explanation; testing may include a urine test and blood tests.

Seek prompt medical care for dark urine with yellow skin or eyes, severe abdominal or back pain, fever, vomiting, confusion, faintness, very little urine, or marked weakness. Urgent assessment is also appropriate after significant heat exposure or muscle injury, especially when urine becomes cola-coloured. Do not wait for the colour to resolve if you feel seriously unwell.

Tell the clinician when the colour began and whether it changes after drinking. Ask whether your medicines, supplements, recent illness, exercise, or possible dehydration could explain it. Ask which urine or blood tests are needed and which new symptoms should prompt immediate reassessment.