For common viral colds, most patients recover on their own in about 7-10 days. For influenza, the majority of patients can recover on their own in about 3-14 days. Clinically, there are two types of colds, one is common viral cold and the other is influenza. Most common viral colds are caused by rhinovirus, parainfluenza virus, respiratory syncytial virus, echovirus and other infections. Clinical symptoms of common cold are mild, mainly including nasal congestion, sneezing, runny nose, low-grade fever, cough and headache, etc. The morbidity rate is relatively high, and most of the patients can recover on their own after about 7-10 days of illness. Influenza is mainly caused by influenza A and B viruses infecting the human body. The clinical symptoms of this disease are more serious, mainly manifested as high fever, headache, fatigue, generalized muscle pain, loss of appetite and cough, etc. The respiratory symptoms are relatively light, and some of the patients may be accompanied by nasal congestion, sneezing, runny nose and other symptoms. Generally, most patients can recover on their own in about 3-14 days, but severe infections can occur tracheitis, bronchitis, bacterial pneumonia, toxic shock, toxic myocarditis and other complications, the course of the disease will be prolonged, and can even be life-threatening. Cold and runny nose should let the patient drink more warm water, pay attention to rest, do not stay up late, do not drink, appropriate supplement vitamin C, local use of nasal drops to relieve the symptoms of cold and runny nose. When the symptoms are more serious, you can follow the doctor’s advice to take cold and flu medication, with the improvement of cold and flu, the symptoms of runny nose will also slowly improve.