Left pneumonitis foci are usually considered to be caused by left pneumonia, and can be treated in conjunction with clinical symptoms. Inflammatory foci generally refers to the lungs with infected foci or foci formed by the chronic mechanization of pneumonia, and left pneumonic foci often appear in the imaging report, such as chest radiographs or chest CT.Inflammatory foci suggests that there is a high density of foci in the lungs, but it is not a malignant foci but an inflammatory foci. If the patient also presents with specific clinical symptoms of pneumonia, such as fever, cough, and sputum, he or she needs prompt medical attention and aggressive anti-infective treatment. If there are no obvious clinical symptoms, just health checkups found that there are inflammatory lesions in the lungs, may belong to the chronic inflammatory lesions, you can temporarily observe first, do not need to be treated, regular review can be.