Cervical spine C5/6 corresponds to the 6th pair of cervical nerves, C6/7 corresponds to the 7th pair of cervical nerves, and C7-L1 corresponds to the 8th pair of cervical nerves, and compression causes numbness in the hand. The sensory nerves innervating the hand are the radial, median and ulnar nerves. Generally, compression of the 6th pair of nerves causes numbness in the muzzle of the hand as well as in the thumb. Compression of the 7th nerve causes numbness in the index, middle, and radial half of the ring finger. Compression of the eighth nerve causes numbness in the ulnar half of the little finger and ring finger. In most patients, cervical nerve root compression occurs in multiple segments at the same time, with varying degrees of severity. Most patients complain of numbness in the whole hand after multiple nerve compression, but there is a difference in the severity of the numbness in different fingers. If cervical spondylosis causes hand numbness, it is recommended that the patient go to the hospital, complete the examination and follow the doctor’s instructions for treatment.