Numbness in the palms and arms, if sudden, can be seen in cerebrovascular disease, which can be seen in lacunar cerebral infarction, transient ischemic attack, and microhemorrhage. Numbness in the palms and arms due to cerebrovascular disease can be accompanied by other symptoms of neurological deficits such as dizziness, headache, and dumb speech. The diagnosis can be confirmed by CT or MRI examination of the head, and treatment should be given to actively address the cause of cerebrovascular disease. Numbness in the palm and arm can also be caused by some periarthritis diseases, especially frozen shoulder, where the patient may experience numbness in the palm and arm and pain after rotator cuff injury, as well as limited movement of the shoulder joint. In these cases, the patient should be given pain relief and active exercise of the shoulder joint if necessary. Numbness in the palms and arms can also be seen in cervical spondylosis. Due to the protruding cervical discs affecting the nerve roots, the patient can experience numbness in the palms and arms, which can also be accompanied by neck pain.