Patchy, dense shadows can be seen in the lungs, which are pathologic patterns of inflammatory changes in the lungs detected by X-rays and CT of both lungs, and are more commonly caused by viral, bacterial, mycoplasma, chlamydia, and tuberculosis mycobacteria, fungal infections, and other infections. Pathogens can cause obvious congestion, edema, inflammatory secretions, adhesions, hyperplasia, and even mucosal rupture, hair vessel rupture and bleeding in the lung foci. Clinically, through active anti-inflammatory drug treatment, the inflammation can gradually subside, relieve, and again see the status of the imaging examination, including patchy high-density shadow will gradually reduce the density, gradually reduce, blurring until disappeared.