A shoulder blade that is flat on one side with a bulge on the other is usually abnormal. A normal scapula is symmetrical and harmonized in outline on both sides. The scapula is a flat, triangular bone located between the 2nd and 7th ribs. The phenomenon that one side of the scapula is flat and the other side is raised is commonly caused by congenital hyperlordosis, scoliosis deformity, trauma resulting in injury to the nerves and muscles innervating the scapula, fracture of one side of the scapula, and localized tumors of the scapula. Normal scapula, located at the posterior lateral side of the thorax, consists of articular glenoid, rostral process, acromion, scapular ridge, subscapular fossa, etc. It is in the state of slight 10-15 degrees of upward rotation, and the two sides of the contour are relatively symmetrical and in a coordinated state. If the scapula is flat on one side and raised on the other side, it is recommended to go to the hospital in time for a clear diagnosis and early formal treatment.