Lung cramps may be caused by lung diseases, pleurisy, pleural effusion and so on. 1. Lung diseases: if the patient has lung infection, pulmonary embolism, lung cancer and other diseases, they may affect the lungs, resulting in localized damage to the lungs, lung cramps and pain, accompanied by coughing, phlegm, nausea and other symptoms. 2. Pleurisy: when patients suffer from infectious pleurisy, tuberculous pleurisy and other diseases, it will easily lead to a large release of inflammatory substances to stimulate the pleural nerves, resulting in pulmonary cramps and pain, accompanied by dyspnea, loss of appetite and other symptoms. 3. Pleural effusion: pleural effusion is mainly caused by inflammation, if not treated in time, it is easy to cause damage to the lungs, appearing lung cramps pain, and accompanied by chest tightness, dyspnea and other symptoms. When the patient has the pain of lung cramps, he should go to the hospital immediately, carry out relevant examinations to clarify the cause of the disease, and actively cooperate with the doctor for treatment.