In the neurology outpatient clinic, about one fifth of the patients are seen with numbness of the extremities as the main complaint, and about one out of every three patients in our hospital electromyography department has electromyography for numbness of the hands. Most of these patients have a long medical history and have undergone preliminary diagnosis in orthopedics, neurology, endocrinology, etc. The diagnosis is based on: 1) cervical spondylosis, 2) peripheral neuritis, 3) precursor of cerebral infarction, etc. Most of these patients have been taking blood-activating drugs. Most of these patients have taken blood-activating drugs or nerve-nourishing drugs. Most of them have not seen significant improvement for several months or years, or their hands have atrophied significantly after frequent visits to various hospitals. According to the comprehensive analysis and patient tracking of cases with numbness of both upper extremities as the main complaint in our electromyography department in the past 2 years, the statistical diagnosis concluded that: 1) carpal tunnel syndrome, 2) mononeuropathy, 3) peripheral neuritis, and the nerve numbness of upper extremities caused by simple cervical spondylosis is minimal. Carpal tunnel syndrome refers to the thickening of the transverse carpal ligament in the wrist due to strain and other reasons, swelling of the muscle in the canal, degeneration of the tissue due to stasis of blood, or degeneration and hyperplasia of the carpal bone, which reduces the circumference of the canal cavity, thus compressing the median nerve and causing numbness and weakness of the fingers and even the whole forearm. It is more common in office workers or rural handicraft workers. It is more common in women than in men. The main symptoms of the disease are as follows: numbness or tingling in the 3.5 fingers on the patient’s flexor side, intensifying at night, waking up from sleep and pain, pain increases when the temperature is high, and can be reduced after activity or shaking the hand; cold season, the affected fingers are cold, cyanotic, finger activity is not sensitive, thumb abduction muscle strength is poor; severe condition of the affected side of the size of the interphalangeal muscle atrophy. It is recommended that patients with upper limb numbness or numbness of the extremities should first be seen in the neurology department of the hospital, and electromyography is preferred for examination to exclude peripheral neuropathy, and finally further imaging examinations are performed to save medical resources and reduce their own costs.