How to check for bronchiectasis: generally, corresponding physical examinations and laboratory tests are used for diagnosis. Early physical examinations may not show positive signs. When the condition is severe or secondary bacterial infection occurs, fixed and persistent moist rales can be heard in the affected areas. Some patients may show signs of oxygen deficiency, such as clubbing and cyanosis. During acute infections, routine blood tests will show increased white blood cell counts and neutrophil counts. Sputum examination may reveal elastic fibers and pus cells. A chest X-ray can show thickened and disordered lung periphery, and typical lesions may appear as honeycomb-like curly shadows.