White sputum in the morning may be caused by pharyngitis, allergic rhinitis and bronchitis. 1. Acute and chronic pharyngitis: the disease is mainly caused by viral and bacterial infections, as well as environmental stimuli, gastroesophageal reflux and other causes of pharyngeal inflammation, resulting in the patient in the morning after the nose with white sputum, mainly manifested as pharyngeal pain, itchy, pharyngeal sensation of foreign bodies and other symptoms. 2. Allergic rhinitis: nasal secretions flow back into the nasopharynx at night, and there will be white sputum after the nose in the morning. 3. Bronchitis: If the patient is affected by infection, physical and chemical factors, allergic reaction, smoking and other factors, the phenomenon of white sputum after the nose in the morning, accompanied by cough, sore throat and other symptoms. It is recommended that the patient go to the hospital in time to get a clear diagnosis and take targeted treatment as prescribed by the doctor.