Instead of coughing and sputum, most of the cold is a normal process of change; in addition, it may be due to the combination of bronchitis or pneumonia. Colds are viral upper respiratory tract infections, the virus violates the nasopharynx after the fever, nasal congestion, sneezing, runny nose, coughing, dry, itchy and sore throat and other discomforts. Most colds clear up naturally in a week or so. Colds often begin with a runny nose, nasal congestion, dry cough or a small amount of clear sputum. As the virus invades and causes inflammation in the airway, resulting in congestion and edema, mucus exudation, phlegm will gradually increase in the later stage, showing a lot of sticky nasal mucus and phlegm. So in 5~7 days after the cold sputum increase, while other cold symptoms reduce, usually considered a normal change in the recovery process of the cold, during which you can drink more water to promote the healing of the condition. Some people who have a cold for a week or so, the cough worsens progressively, and there is purulent sputum that is not easy to cough up, or there is shortness of breath and other discomforts, it is considered that there may be lower respiratory tract infections, such as bronchitis or pneumonia, it is recommended that specialists listen to the examination, under the guidance of a doctor, to give anti-inflammatory and expectorant medications such as Cefixime, Ambroxol, and so on. Cough sputum, it is recommended to combine the duration of the disease and the specific symptoms to identify, cough significantly aggravated, it is recommended to standardize the treatment under the guidance of specialists, so as not to aggravate the condition.