What should you know about dark foul urine?

Urine becomes darker and stronger-smelling when it is concentrated, such as after sweating, limited fluid intake, or overnight. A strong odour with burning, urgency, frequent small amounts, lower abdominal pain, or cloudy urine can occur with a urinary infection. Foods, vitamins, and medicines may change smell as well. Dark brown urine with yellow eyes or skin is a separate warning pattern that can involve the liver or bile system. Smell by itself cannot identify the cause.

Drink fluids regularly if you have no fluid restriction, and see whether the smell improves as urine becomes paler. Record any pain, urgency, fever, discharge, or change in amount. Avoid perfumed products around the genitals and do not take leftover antibiotics. Book a medical review if the odour lasts, returns repeatedly, or comes with urinary symptoms. A fresh urine sample can help identify infection, blood, or other changes.

Seek same-day care for fever, chills, back or side pain, vomiting, pregnancy with urinary symptoms, or visible blood. Emergency help is needed for confusion, fainting, severe weakness, yellowing, severe pain, or very little urine. Heat exposure with dizziness, headache, or reduced alertness also warrants prompt assessment.

Ask whether you need a urine dipstick, culture, or blood tests. Mention when the change began, whether it follows waking or exercise, your fluid intake, sexual or menstrual context if relevant, recent medicines, and any fever, pain, discharge, or yellowing.