The cough can be divided from the following aspects: 1. the nature of the cough, generally hot cough is more violent and violent, a burst of cough can not be stopped; while the cold cough is intermittent, the sound is relatively low. 2. can also be divided from the situation of the sputum, generally cold cough sputum is mostly white sputum, and more clear or even transparent or foam, such sputum is generally cold sputum, naturally this cough is also a cold cough. If the hot cough is accompanied by hot sputum, most of the hot sputum is purulent, can be yellow, green or even black, there may be white, not white sputum is definitely cold sputum, if it is white, sticky pus sputum, in fact, is also a hot cough and then out of the sputum. 3, accompanied by symptoms, if there is fear of cold, fear of wind, always feel tight, sleepy, generally cold; and fever, sore throat, and then thirst If you have fever, sore throat, thirst, bitter mouth, dry mouth, dry stool, these are all accompanied by hot cough.