If the patient has limited pleural thickening, the specific cause of the disease can be identified first. The general condition can be clarified by completing chest CT and taking blood tests for routine and biochemical blood tests. After improving the examination and clarifying the condition, more effective measures can be taken for treatment. If the pleural thickening is due to infection in the chest cavity, effective anti-infection treatment can be provided by drip antibiotics, such as levofloxacin hydrochloride, moxifloxacin or cephalosporins. If the condition is caused by tuberculosis, effective anti-tuberculosis treatment can be carried out by taking oral isoniazid, rifampin and other related anti-tuberculosis drugs.