1, cough does not forget the ear, nose and throat, stomach disease esophagus and reflux; 2, the elderly night cough worry about heart failure, children night cough afraid of worms; 3, dry cough less sputum with blood, beware of tuberculosis in the endothelium; 4, cough does not heal think has been sick, drug treatment also cause disease; 5, think of lung disease think outside the lung, the whole body disease consider week; 6, think of the congenital think of pollution, do not forget the decoration and dressing;.