Tuberculous pleurisy for 40 years may be related to low immunity, abnormally high body reactivity, malnutrition, and physical and mental overwork. 1. Low immunity: it will lead to the weakening of the body’s resistance and defense against germs, and the tuberculosis bacillus will directly invade into the pleural area, thus causing the onset of tuberculosis pleurisy. 2. Increased body reactivity: it will cause the pleura to be highly reactive to tuberculosis, which will lead to abnormal exudation of the pleura and trigger tuberculous pleurisy. 3. Malnutrition: relevant studies show that half of the cases of tuberculous pleurisy have different degrees of malnutrition. 4. Physical and mental fatigue: can also induce tuberculous pleurisy, if long-term in the big intensity, big physical work state, by tuberculous pleurisy infringement of the chances will appear significantly increased. It is recommended to attach great importance to the diagnosis and treatment of tuberculosis pleurisy.