There is no such thing as a bacterial cold. Colds are caused by viruses, including the common cold and influenza. The common cold is a self-limiting disease and usually resolves within 1 week. In the case of influenza without complications, the body temperature usually drops 3 to 5 days after the onset of the disease. Common colds are caused by common viruses, such as rhinovirus and adenovirus, and are characterized by respiratory symptoms, such as throat discomfort, sneezing, nasal congestion, runny nose, etc. Occasionally, a high fever may develop. It usually clears up mostly within 7 days. If the common cold is secondary to a bacterial infection, there may be a high fever, pus and runny nose, worsening of symptoms, and a prolonged course of the disease. The duration of fever is also not necessarily. Influenza is caused by the influenza virus, and most often starts suddenly. Symptoms of influenza virus-induced colds such as fever, body aches, sore throat, and fatigue can be more severe. Without complications, the course of the disease is self-limiting, and the fever lasts 3 to 5 days before the temperature drops and the general symptoms improve. However, coughing and recovery of energy often take longer. If the cold is not cured for more than seven days, or there is a high fever that does not go away, yellow sputum, etc., it is recommended to go to the hospital in time.