Bacterial colds and viral colds are named after the different microorganisms that cause the symptoms of colds. The upper respiratory tract includes the nose, pharynx, and larynx. Usually, when the body's resistance decreases or one is overly fatigued, it is very easy to be infected by external pathogens such as bacteria and viruses. However, when bacteria infect the human body, most of the symptoms are mainly concentrated in the nasopharyngeal area and do not spread throughout the body. On the other hand, viral colds are different. After infecting the human body, in addition to causing respiratory symptoms, viral colds also cause general discomfort throughout the body, such as headaches, limb weakness, muscle soreness, joint pain, and can even lead to abdominal pain, nausea, vomiting, and other symptoms. Thus, viral colds produce more severe whole-body symptoms.