If you have a tickling cough with white sputum in your throat, you can go to the hospital for sputum culture, blood test, X-ray, bronchoscopy and other tests to help the doctor to clarify the cause of the disease and understand the progress of the disease. 1. Sputum culture: It helps to diagnose the disease by knowing the amount, color, smell and nature of sputum. It can detect pathogens such as Mycobacterium tuberculosis, cancer cells, Schistosoma eggs, amoebic trophozoites, or fungi or bacteria in the sputum. 2. Blood: If there is an increase in eosinophils in the blood, this may indicate the presence of allergic or parasitic diseases. 3. X-ray: To help diagnose whether a tickling cough is caused by lung disease, an X-ray may reveal abnormal shadowing of the pulmonary blood vessels. 4. Bronchoscopy: It can find foreign bodies in the bronchial tubes, endobronchial tuberculosis and bronchial tumors, etc., and help to make a clear diagnosis. Itchy throat and cough suggests that the patient go to the hospital in a timely manner to improve the relevant examination and clarify the cause of the disease.