In most cases, pneumonia is not self-healing, but it may be possible if the pneumonia is mild and the patient is in good health. Pneumonia is an inflammation of the lung parenchyma, and is a common and frequent disease. It is usually caused by immune damage, infection, and physical and chemical stimuli, and can be categorized as bacterial pneumonia, viral pneumonia, Mycoplasma pneumonia, community-acquired pneumonia, hospital-acquired pneumonia, and many other types. In the vast majority of cases, pneumonia cannot be cured on its own. If patients do not receive regular treatment as soon as possible, the further development and aggravation of the disease will lead to more damage to lung tissues, and may even lead to the serious consequences of death. However, some pneumonias are related to physical and chemical factors, immunity, etc., and may recover on their own if the irritating factors are removed and the lesions are mild. There are significant differences in the condition, physical health, and cause of each pneumonia patient, and therefore the prognosis that patients receive will be different. Once an individual is diagnosed with pneumonia, it is important that he or she follows the doctor’s instructions for standardized treatment.