Subpleural high-density patchy shadow in the apical segment of the upper lobe of the right lung is mostly caused by pneumonia, tuberculosis, lung tumor and other diseases, which can be treated with antibacterial drugs, anti-tuberculosis drugs and surgery. 1. Antimicrobial drugs: for the treatment of right upper lobe apical segment pneumonia, penicillin, cephalosporin, macrolides, quinolones antibacterial drugs can be used for treatment, such as amoxicillin, cefixime, roxithromycin, levofloxacin and other drugs. 2. Anti-tuberculosis drugs: used for the treatment of tuberculosis in the apical segment of the upper lobe of the right lung, commonly used therapeutic drugs include rifampicin, isoniazid, ethambutol, pyrazinamide, streptomycin and so on. 3. Lung tumors: used for the treatment of right lung tumors in the apical segment of the upper lobe of the lung, if the patch shadow is small and without discomfort symptoms, it can be temporarily observed and regularly rechecked; if the edge of the patch shadow is irregular and there is the possibility of malignancy, it is feasible to perform surgical resection. These drugs above have different degrees of adverse reactions, such as gastrointestinal irritation, allergy, liver and kidney function impairment, etc. When using these drugs, be sure to use them strictly according to the doctor’s instructions under the guidance of the doctor.