Itchy throat at night with phlegm cough daytime is fine, should first go to the hospital for examination to clarify the cause of the disease, considering the possible cough variant asthma, reflux pharyngitis and post-nasal drip syndrome. 1. Cough variant asthma: cough variant asthma belongs to a kind of asthma, and other asthma is different, there will not be obvious wheezing or shortness of breath phenomenon, the main symptom is a cough, coughing at night will be more serious symptoms, may also be in the night time contact with the bedding in the allergens caused by the coughing. 2. Reflux pharyngitis: reflux pharyngitis refers to the abnormal reflux of gastric contents into the pharynx, which causes chronic symptoms and mucosal damage of pharyngitis, the pathogenesis is still unclear, the main symptoms are hoarseness, pharyngeal pain, coughing and other manifestations. 3. Postnasal drip syndrome: Inflammation of the nasal cavity and sinuses may result in an increase in secretion, which flows from the nasopharynx down to the pharynx. Distraction during the day, after lying down at night due to the effect of gravity mucus backflow is obvious, stimulate the pharynx caused by coughing. Repeated occurrence of this symptom, it is recommended to go to the hospital in a timely manner to improve the examination, to clarify the cause of the disease, to give targeted treatment or treatment, not blindly self-medication.