Chin retraction can be judged by facial shape, dental occlusal relationship, and imaging examination. 1. Facial shape: When the chin is retracted, the face appears incongruous from the lateral view, when the tip of the nose, lips and chin are not in the same straight line, and the chin is behind the straight line. 2. Dental occlusal relationship: when the chin is retracted, the dental occlusal relationship is abnormal, the front teeth are deeply covered, the upper front teeth will also be obviously tilted, the lower front teeth bite high on the tongue surface of the upper front teeth or the palatal mucosa, it can be seen that the lower arch of the teeth is obviously smaller than the upper arch of the teeth, and the lower lip is attached to the tongue surface of the upper front teeth. 3. Imaging examination: If you want to accurately determine chin retraction, you can go for imaging examination, including X-ray cephalometric examination and 3D CT examination of the skull, which can obviously detect the state of the chin. If you suspect that you have a receding chin, you can go to a regular hospital in time to let a professional doctor judge.