Three-year-old baby coughing phlegm with low fever, the cause of consideration of the emergence of respiratory tract infections, it is recommended to actively receive standardized treatment, such as general treatment, drug therapy, etc., to promote the improvement of symptoms. 1. General treatment: it is recommended to drink more warm water, physical cooling, light diet, avoid spicy and stimulating food, maintain a suitable indoor environment, adequate rest. 2. Symptomatic supportive treatment: nebulized inhalation of salbutamol, aminoglutethimide and other drugs to dilate the airway and promote the discharge of sputum. 3. Treatment of pathogens: clinically 3-year-old baby coughing, with coughing up sputum, most often seen in bacterial or viral infections, such as bacterial infections caused by the doctor’s orders to take antibiotics such as penicillin, azithromycin and other drugs to fight infections; such as the consideration of viral infections, nebulized sputum inhalation, rehydration of fluids and other symptomatic supportive treatment. If the baby’s condition is serious, it may need ventilator-assisted ventilation. Three-year-old baby coughing phlegm with low fever, need to actively seek medical attention, a clear diagnosis, drugs need to be under the guidance of a physician reasonable application.