Numbness of the index finger of the right hand may be caused by overexertion, or it may be caused by cervical spondylosis, carpal tunnel syndrome, and other diseases such as peripheral neuritis. 1. Overwork: If you work with your right index finger for a long period of time, it may lead to abnormal function of the peripheral nerves of the right index finger, and the patient will experience numbness of the right index finger. This is a normal physiological phenomenon, and the symptoms will usually be relieved after rest. 2. Cervical spondylosis: cervical spondylosis is caused by cervical degenerative disease, cervical spine developmental spinal stenosis, cervical spine chronic strain and other factors. Patients will have numbness and weakness of the limbs, neck and back pain and other manifestations, so patients will have the symptom of numbness of the right index finger. 3. Carpal tunnel syndrome: Carpal tunnel syndrome is caused by the compression of the median nerve in the carpal tunnel, smaller lumen of the carpal tunnel, and increased contents of the carpal tunnel. The patient will show numbness or pain in the index finger and thumb, and if the patient has carpal tunnel syndrome in the right hand, it may show numbness in the index finger of the right hand. 4. Other: patients with peripheral neuritis, cerebral infarction, cerebral hemorrhage and other diseases will show numbness of the right index finger. If the numbness of the right index finger is caused by overexertion, it can be left untreated. If the numbness of the right index finger is caused by diseases, it is necessary to consult a doctor and follow the doctor’s instructions to choose the appropriate measures for treatment.