What should I do if I keep coughing without catching a cold

No cold has been coughing, to be alert to allergic cough, such as pollen, dust mites allergy, can cause allergic rhinitis, bronchitis, allergic asthma will show airway hyperreactive cough, can apply anti-allergic drugs and antihistamine drugs, relieve bronchospasm. Common tumors such as primary lung cancer, metastatic lung cancer, bronchial cancer, mediastinal tumors will also show dry cough, cough occasionally accompanied by expectoration, sputum with blood, to actively carry out chest CT examination, to prevent dust mites, flower dust, dust and other substances contact.