Excessive sputum after laryngeal cancer surgery may be caused by localized exudation due to inflammatory stimulation, or it may also be caused by lowering resistance of the patient’s body and infection in lungs after surgery. 1. Exudation caused by inflammatory stimulation: after surgery for laryngeal cancer, inflammatory stimulation will stimulate the respiratory tract to exudate, so sputum will increase. Generally, the sputum will gradually decrease with the recovery of the disease. 2. Lung infection: after laryngeal cancer surgery, the resistance of patients may be lowered, and they may be easily infected by pathogens, which may lead to lung infection and phlegm, and they need anti-infection treatment if necessary. Patients with excessive sputum after laryngeal cancer surgery should consult a doctor in time, and under the guidance of professional doctors, clarify the cause of the disease and treat it actively.