The symptoms of atlanto-axial subluxation are mainly manifested in the cervical-occipital region, cerebrovascular nerve, five senses and the whole body, etc. The details are as follows: 1. abnormalities; 3, the five senses: can be manifested as visual fatigue, nasal congestion, nasal allergy, eye swelling and pain, tinnitus, hearing impairment, etc.; 4, the whole body: mainly manifested as weakness, sleepiness, limb fatigue, can also be manifested as gait instability, and even sudden collapse.