Small patchy hyperdense shadows in the lungs may be caused by pneumonia, tuberculosis or lung tumors, etc. Patients may choose medication as well as surgery according to their conditions. 1. Pneumonia: Pneumonia may be caused by bacterial infection in the lungs. Inflammation will cause irritation to the lung tissue, leading to the appearance of small patchy hyperdense shadows in the lungs. Patients can be treated with a variety of antibiotics such as levofloxacin, amoxicillin or ceftazidime as prescribed by the doctor, which will help to kill the pathogens. 2. Tuberculosis: Tuberculosis can be caused when the lungs are infected by Mycobacterium tuberculosis. The disease can also affect the lungs and cause the above mentioned manifestations. Patients can be treated with a variety of medications such as ethambutol and moxifloxacin under the guidance of a doctor, which can help kill Mycobacterium tuberculosis. 3. Lung tumors: patients with lung tumors can also cause the above symptoms, which can be treated by surgical resection of the tumors. Patients with small patchy hyperdense shadows in the lungs should go to the hospital in time and choose the appropriate method of treatment.