The concavity of the lateral bones of the head may be caused by the following reasons: 1. normal bony concavity, such as the posterior lateral arch of the eyebrow, that is, the position of the temple, is the part of the human wing point, which is at the intersection of the frontal bone, parietal bone, temporal bone and butterfly bone, itself is a normal bony concavity, some patients may be relatively obvious; 2. old fracture of the skull, such as the patient 2, old fracture of the skull, for example, the patient’s head suffered direct impact, which can cause depressed fracture of the skull, which can leave local depression in this area after recovery; 3, serious malnutrition, for example, the patient can not eat for a long time, malnutrition or the presence of tumor, tuberculosis and other wasting diseases, which can lead to serious malnutrition and cause facial depression, for example, the head and face have orbits or the side of the head is very obvious soft tissue collapse will The normal bony depression becomes very obvious.