Cervical spondylosis: When people enter middle age, cervical discs or osteophytes once the adjacent cervical nerve roots, sympathetic nerves, spinal cord or blood vessels are compressed, cervical spondylosis occurs, causing numbness of the fingers, and even dizziness, weakness of the limbs, walking limp, urinary and fecal disorders, etc. Carpal tunnel syndrome : For the numbness and pain of the thumb, index and middle finger, there is often a history of numbness and waking up at night, which can be improved or completely relieved by activities (shaking the wrist) after waking up; severe cases can be accompanied by hand muscle atrophy, which affects the fine movements of the hand. Elbow canal syndrome (ulnar nerve entrapment syndrome): If the numbness and pain of the ring and little finger, there can also be a history of nocturnal numbness and awakening; in severe cases, it is accompanied by muscle atrophy, and the flexion force of the ring and little finger decreases, which affects fine use. Thoracic outlet syndrome : People who often lift and carry heavy objects can cause hypertrophy of the shoulder girdle muscles and ligaments, which can cause symptoms of compression of the neurovascular bundle, such as abnormal sensation, wood, numbness, and pain in the medial side of the arm. Workers who often over-extend their upper limbs or certain sports players, workers who are in a long-term position with their shoulders extended forward, elderly people and middle-aged people with hunched backs are prone to develop symptoms of thoracic outlet syndrome. Normal movements of the upper extremities such as upper arm abduction, backward sagging of the shoulder, neck extension, turning the face to the opposite side, and deep inhalation cause increased compression of nerves and blood vessels, resulting in increased symptoms. Cerebrovascular disease (called stroke in Chinese medicine): For middle-aged people over 40 years old, if they often have headache, dizziness, light-headedness, numbness of the limbs, swelling of the tongue, etc., and if they usually have hypertension, hyperlipidemia, diabetes, cerebral arteriosclerosis, etc., they should pay more attention and be alert to the occurrence of stroke. Menopause: Women with menopause sometimes have numbness in the hands (often bilateral at the same time), but it is not obvious and disappears with the end of menopause; sometimes the symptoms may be relieved by treating menopausal syndrome or giving anti-rheumatic drugs and vitamin B complex. Diabetic neuropathy: abnormal skin sensation in the extremities, numbness, pins and needles, ants walking sensation. The sensation of stepping on cotton on the soles of the feet, alternating diarrhea and constipation, urinary retention, hemiplegia or occasional profuse sweating, sexual dysfunction. Peripheral neuritis: Inflammatory reaction of the peripheral nerves of the fingers due to poisoning, infection, vitamin B deficiency, impaired blood supply to the fingers, etc., resulting in numbness in both hands and a glove-like symmetrical distribution of the hands. Radial nerve damage: The radial nerve is more likely to be damaged in the middle and lower part of the upper arm, resulting in numbness and pain on the back of the thumb and index finger and drooping of the fingers and wrist. Brachial plexus nerve damage: lesions or injuries in the axillary region or anterior cervical region can cause mixed symptoms of total or partial damage to the ulnar, median, and flexor nerves. In conclusion, the diagnosis of finger numbness symptoms requires a detailed medical history, physical examination by a medical professional, and also reference to cervical spine films, MRI, electromyography and other ancillary tests to make a clear diagnosis.