Numbness of the fingertips of the ring finger of the right hand is mostly seen in peripheral neuritis, local cold, cervical spondylosis, carpal tunnel syndrome, and its causes are as follows: a. Peripheral neuritis is mostly seen in patients with diabetes mellitus, often due to persistent and prolonged increase in blood sugar. Patients are often accompanied by dry mouth, polyphagia, polyuria, polydipsia, wasting, etc. Severe patients may be accompanied by chills at the end of the extremities. Second, local cold is often seen in patients with prolonged contact with objects of low temperature and low temperature of living environment, after local insulation numbness can disappear without special treatment. Third, cervical spondylosis is most often seen in patients who work long hours with heavy physical labor, or work with their heads down for a long time, in addition to numbness of the fingers, can also show discomfort in the back of the neck, dizziness, shoulder soreness, etc. Fourth, carpal tunnel syndrome is mostly seen in patients who work with wrist strength, and the numbness mostly appears at night, and the numbness can be significantly reduced or disappeared after moving the wrist joint.