Both MDR and XDR-TB can only be diagnosed in a well-equipped laboratory. Symptoms of XDR-TB are no different from ordinary TB: a cough with thick, cloudy mucus (or sputum), sometimes with blood, for more than 2 weeks; fever, chills, and night sweats; fatigue and muscle weakness; weight loss; and in some cases shortness of breath and chest pain. If you have these symptoms, it does not mean you have MDR/XDR-TB. But it does mean you must go and see a doctor for a check-up. If you are already on treatment for TB, and at least some of these symptoms are not improving after a few weeks of medication, you should inform your clinician or nurse.