A tickling dry cough without phlegm after a cold, especially at night, may be associated with cough variant asthma, gastroesophageal reflux, and heart failure. 1. Cough variant asthma, a typical disease that can cause nighttime coughing bouts, may be genetically and environmentally related, and colds can aggravate the symptomatic manifestations, with a predominantly irritating dry cough. 2. Gastroesophageal reflux (GERD). In people with a history of GERD, the reflux of gastric juices can be more severe at night after lying down. Irritation of the esophagus may result in a cough that is dry and sputumless. 3. Heart failure, due to myocardial systolic or diastolic dysfunction, caused by the heart blood circulation disorders. It can cause lung stasis and cough, manifested as dry cough without sputum symptoms. Specific causes need to be clarified after medical examination, and at the same time in accordance with the doctor’s instructions for treatment.