Symptoms of bacterial cold include stuffy nose, runny nose, headache, discomfort in the neck and back, cough, sore throat, coughing phlegm, loss of appetite, bloating, chills or fever, or cold and fever. As the lungs are the delicate organs, and the lungs are in harmony with the skin, when the body feels external evil, the lungs will be the first to be attacked and show a series of symptoms. As the lungs are open to the nose, the external evil will disturb the nasal passage and manifest itself in the form of nasal congestion, which is actually caused by edema of the nasal mucosa. At the beginning of the cold, there will be clear snot, and when the fight between positive and evil is intense, there will be cloudy snot, and if there is Pseudomonas aeruginosa infection, the color of nasal snot will be grayish yellow or yellowish green. If the lung is combined with the skin and hair, it is responsible for the defense of the outside. If the defense of the outside is not in order, headache and discomfort in the neck and back will occur. The lung is connected to the throat, so if you have a bacterial cold, you will have various symptoms in the throat, such as sore throat, cough and phlegm, etc. If you do not recover from the cold for a long time, you will also have a dry throat. The positive qi will mobilize the stomach qi to fight against external evil, thus the gastrointestinal function is in a relatively low state at this time, and symptoms such as abdominal distension, indigestion, and even constipation may occur. The symptoms are mainly in the nose, throat, gastrointestinal digestive system and head.