Children lying down for a while on the frequent coughing situation, may be caused by bronchitis, sinusitis, reflux esophagitis and other diseases. 1. Bronchitis: bronchitis is an inflammation of the trachea, bronchial mucosa and its surrounding tissues, the main symptoms manifested in coughing, coughing up phlegm and other symptoms, the child lying down for a while on the frequent coughing may be caused by bronchitis. 2. Sinusitis: Sinusitis is an inflammatory disease of the mucous membrane of the sinuses, sinusitis patients are mainly nasal congestion, thick mucus, head and face pain, loss of smell as the main manifestations of the child lying down in the nasal cavity after the flow of secretions to the throat, may produce symptoms of irritation, resulting in frequent coughing. 3. Reflux esophagitis: Reflux esophagitis belongs to the gastroesophageal reflux disease, when the gastroduodenal contents reflux into the esophagus, may cause acid reflux, heartburn, chest pain, dysphagia and other symptoms, some patients may be accompanied by asthma, chronic cough and other conditions. Children lying down for a while on the frequent coughing, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.