Bone protrusion under the neck may be the body’s normal bony protrusion, may also be caused by pathological factors such as trauma, cervical degenerative changes, cervical spine small joints dislocation. 1. Normal bony protrusions: normal people’s neck will exist below the bony protrusions such as the cervical spine after the neck, bilateral clavicle of the sternal head area, especially the thin people bony protrusions are relatively obvious. 2. Pathologic factors (1) Trauma: for example, old fracture and dislocation of the cervical vertebrae may cause bone protrusion under the neck after recovery. (2) Degenerative changes of the cervical vertebrae, such as osteophytes, straightening of the physiological curvature of the cervical vertebrae or retroversion of the cervical vertebrae, can cause abnormal bony protrusions of the cervical vertebrae, which can lead to the protrusion of the bones under the neck. (3) Misalignment of cervical vertebrae joints: If the head is bowed for a long time, the cervical vertebrae joints will be misaligned, resulting in joint disorders and protrusion of the bones under the neck. If the protrusion appears under the neck, it is recommended to consult a doctor in time. If it is an abnormal bony protrusion, it should be treated actively to avoid delaying the condition.