Nasal incitement is an abnormal movement of the nose, mainly nasal flapping. In normal people, this kind of nostril opening and shrinking with breathing movement should not occur in calm breathing. This condition is mostly seen in dyspnea caused by hyperthermia, such as lobar pneumonia, bronchial asthma, and vitamin C deficiency, liver disease or hemorrhagic disease of the blood system. It is advisable to take a chest X-ray and a blood test according to the above symptoms. Laboratory tests for nasal incitement: 1, chest X-ray: increased lung texture, disorder, small, patchy shadows, or large uneven shadows. 2, peripheral blood tests: bacterial pneumonia leukocyte count and neutrophils increased; viral pneumonia leukocyte count normal or reduced, lymphocytes may increase. 3, pathogenic examination: bacterial culture, respiratory virus detection, Mycoplasma pneumoniae detection, etc., can obtain the corresponding pathogenic diagnosis, pathogen-specific antigen or antibody detection often has early diagnostic value.