The common cold, commonly known as “cold”, is a common respiratory illness caused by a variety of viruses, with nasopharyngeal catarrhal symptoms as the main manifestation. The common cold can occur in any season of the year, and is more likely to occur in winter and spring. It is mostly disseminated and does not cause epidemics. Influenza is an acute respiratory infection caused by the influenza virus, which can be prevalent in a wide range of people within a short period of time. Influenza epidemics are common in winter and spring. Influenza virus includes four types, namely type A, type B, type C and type D. Influenza A virus infection is more common. 1, whether fever Influenza specific symptoms are high fever (body temperature up to 39-40 ℃), chills, chills, body aches and nausea. Fever is usually the most important feature of influenza; while flu may have fever, but the temperature is usually not too high, and the symptoms are usually stuffy nose, runny nose, itchy throat, sore throat, cough, etc. 2, whether the symptoms are fierce or not Most of the symptoms of cold patients will last for many days before gradually reaching the peak; while the flu attack is extremely fast and violent, showing the characteristics of an emergency. 3. Dizziness, chest pain and shortness of breath When symptoms of dizziness, chest pain and shortness of breath appear, it indicates that the disease may have progressed further and the doctor recommends that you seek medical attention as soon as possible. 4. Coughing is usually a symptom of the common cold, but if you have a severe cough with yellow phlegm, it is a cause for concern. Note: Influenza can be mild or severe, with mild cases recovering in 2 to 3 days and severe cases in 1 to 2 weeks, and there are cases where the illness lasts for a month or longer. Influenza should be treated promptly, otherwise it can easily lead to a series of complications, including pneumonia, viral myocarditis, etc.