Rhabdomyolysis and myoglobinuria

Myoglobin is a muscle protein that can enter the bloodstream when muscle fibres break down. The kidneys filter it, and urine may become tea-coloured, brown, or unusually dark. Urine colour alone cannot confirm the cause: dehydration, blood, food, and medicines can also change appearance. A urine test, CK blood test, kidney function, and electrolyte checks help clinicians assess the situation.

Some people have substantial muscle injury without obvious dark urine. Severe muscle pain, tenderness, swelling, weakness, or reduced urination therefore matters even when the urine looks normal. Recent strenuous exercise, heat exposure, injury, prolonged immobility, infection, seizures, and medicine or supplement use are useful details to share.

Stop strenuous activity and arrange prompt medical assessment if myoglobinuria or rhabdomyolysis is suspected. Follow the fluid advice provided; people with heart or kidney conditions may need a tailored plan. Do not rely on sports drinks or supplements as treatment. Note changes in urine amount and colour, and bring details of recent exercise, illness, medicines, and supplements.

Seek urgent care for dark urine with muscle pain or weakness, very little urine, worsening swelling, vomiting, confusion, fainting, or severe dehydration. Go to emergency care for breathing difficulty, chest pressure, collapse, or a new irregular heartbeat. Early testing can identify kidney and electrolyte problems before symptoms become more severe.

Does my urine result suggest myoglobin or another cause of dark urine? Should CK, kidney function, and electrolytes be repeated? How much should I drink given my health history? What activity is safe while I recover?