Multiple small nodular hyperdense shadows are seen in the lower lobes of both lungs requiring treatment. It may be pneumonia, tuberculosis, lung tumor, etc. It is usually treated symptomatically according to the condition. 1. Pneumonia: it needs to be treated according to the causative agent. Penicillin is generally used to treat streptococcal infections, and quinolones such as levofloxacin are used for allergy. Staphylococcus aureus etc. use penicillinase-resistant semi-synthetic penicillin, cephalosporins etc., such as benzoxacillin sodium, cloxacillin etc. 2. Tuberculosis: commonly used drugs are isoniazid, rifampicin, pyrazinamide, ethambutol, streptomycin and other drug therapy. It should be early, regular, whole course, appropriate amount and combined. 3. Lung tumor: treatment methods include surgery, drugs, radiation, interventional therapy and so on. Drug therapy includes carboplatin, cisplatin, paclitaxel, docetaxel, vincristine, irinotecan and other drugs. Drugs such as pembrolizumab and nabumab may also be used. Do not self-administer medications if abnormal lung imaging is present. You need to seek medical attention as soon as possible to avoid serious complications.