The pneumonia is often seen for the following reasons: 1, the course of pneumonia treatment is not enough, adults with common bacterial pneumonia using antibiotics treatment time, Western medicine in 7-14 days, if the pneumonia treatment time is too short resulting in bacteria residual in the body, when the body resistance to decline in the bacteria and re-breed in the lungs, thus causing pneumonia again. 2, treatment drugs are not sensitive, the use of drugs only temporarily inhibit the reproduction of bacteria, inflammation The pneumonia may occur again at the same site or at other sites. 3. The body’s resistance is reduced or there are immune deficiencies, such as malnutrition or extreme emaciation, long-term anemia, radiotherapy, HIV infection, long-term hormone use, are vulnerable to bacterial invasion and recurrent pneumonia.