Lying down with a tickling cough in the throat may be due to reflux esophagitis, chronic pharyngitis, postnasal drip syndrome and other causes. 1. Reflux esophagitis. Suffering from reflux esophagitis, when lying down, it is easy to cause gastric acid reflux, which stimulates the pharynx, thus causing itchy throat, cough and other symptoms. 2.. Chronic pharyngitis. Chronic pharyngitis is caused by bacterial infection, prolonged exposure to dust and other environments, and pharyngeal reflux, leading to symptoms such as sore throat, dry cough, and foreign body sensation in the pharynx, thus causing itching in the throat. 3.. Postnasal drip syndrome. The patient’s nasal secretion increases, and when the patient changes from standing position to lying position, the secretion in the nasal cavity backs up to the throat, thus stimulating symptoms such as throat itching and coughing. Lying down on the throat itchy cough there are other possibilities, should go to the hospital in time, symptomatic treatment.