Thumb numbness, may be the result of irrational posture, may also be caused by certain diseases, disease patients should be alert to stroke, cervical spondylosis, peripheral neuritis, cardiovascular disease and so on. 1. Non-disease causes: numbness of the thumb, may be accustomed to some kind of irrational position compressed to the arm nerve caused by changes in posture posture more rest, can be relieved. 2. Stroke: stroke patients will appear limb numbness, headache, nausea, etc., numbness of the thumb is also one of the symptoms. 3. Cervical spondylosis: Because of the pathological reaction of cervical spine, the spinal nerves are compressed or stimulated, resulting in numbness of the fingers. 4. Peripheral neuritis: the main symptom is symmetrical sensory impairment of the distal limbs, the initial stage is often manifested as burning, pain, numbness and other sensory abnormalities in the fingers or toes. 5. Cardiovascular diseases: such as congenital heart disease, coronary heart disease, hypertension, aortic coarctation, etc., will be due to the blood does not flow, blood vessel clogging, blood circulation is blocked, resulting in numbness in the fingers. Thumb numbness is not necessarily caused by disease, to rule out disease causes, it is recommended that patients go to the hospital in a timely manner, other diseases such as rheumatoid arthritis, carpal tunnel syndrome, etc. can also lead to numbness of the fingers, it is recommended that according to the cause of the corresponding treatment, treatment in accordance with the doctor’s instructions.