If the patient walks crookedly all of a sudden, the possibility of cerebrovascular disease is more likely to be considered, which is mainly seen in brainstem or cerebellar lesions. Because the brainstem and cerebellum are in charge of balance, especially the cerebellum, when cerebellar lesions occur, the patient may walk with a skewed posture, usually more pronounced to the affected side. In the case of cerebellar earthworm lesions, the patient may walk with a back-and-forth tilt. In the case of brainstem lesions, the patient may have a skewed walk, weakness of one limb, and dizziness. Walking skewness that progresses slowly and worsens gradually can be seen in some degenerative diseases, such as multiple system atrophy. Due to cerebellar or brainstem atrophy, patients can walk skewed, poor balance function, accompanied by changes in muscle tone, and postural hypotension, etc. According to the specific conditions of the patient, head magnetic examination.