Bilateral lung texture increase heart shadow is not big is the chest radiograph professional description, can be either physiological, pathologic, or due to technical reasons. 1. Physiologic causes: increased lung texture without any clinical symptoms may be completely physiologic. Generally, middle-aged and old people can have increased lung texture, and the cardiac shadow is not big, which means that the cardiac morphology is normal. 2. Pathological causes: If there is fever, cough, sputum and other clinical symptoms, it is mostly due to bronchitis or pneumonia, mostly caused by bacterial, viral, mycoplasma and other infections that lead to the increase in the texture of both lungs. If further diagnosis is clearly for bacterial or viral infections caused by double lung texture increase should actively cooperate with the doctor treatment. 3. Technical reasons: low exposure when taking chest radiographs can also lead to the illusion of increased lung texture. Therefore, the increase in lung texture is not necessarily a disease, but we should consult the doctor for a clear diagnosis and actively cooperate with the doctor’s treatment.