How is rhabdomyolysis diagnosed?

A clinician asks about recent intense exercise, heat, trauma, prolonged immobility, seizures, illness, medicines, supplements, and substances. They examine painful or swollen muscles, strength, hydration, circulation, and vital signs. Symptoms may include muscle pain, weakness, swelling, or dark urine, but the pattern can be incomplete. Muscle soreness after exercise alone is not enough to establish the diagnosis.

Bring a list of medicines and supplements, and describe when exercise or injury occurred and when symptoms began. Blood testing commonly checks creatine kinase, kidney function, and electrolytes; urine testing can provide additional information. Results may be repeated to follow the direction of muscle injury and kidney stress. Further tests depend on the suspected cause and examination findings.

Seek emergency care for very little urine, dark urine with marked muscle symptoms, rapidly worsening swelling, severe weakness, confusion, collapse, breathing difficulty, or ongoing vomiting. After heat illness, a major injury, seizure, or prolonged compression, prompt assessment matters even if the urine looks normal.

Ask what each test is checking, whether your kidney function or electrolytes need monitoring, when results should be repeated, and which alternative causes of pain or weakness are being considered. Confirm what symptoms should bring you back urgently.