Numbness of the thumb is not usually caused by rabies, but by crush injuries, herniated lumbar discs, nerve damage, poor peripheral circulation and diabetes. 1. Crush injury: If the thumb is crushed, it will cause obvious swelling, numbness, bruising and pain in the thumb area. 2. Herniated lumbar intervertebral discs: especially herniated lumbar intervertebral discs from 4 to 5, which can easily cause nerve root compression and numbness of the thumb as well as weakness of the thumb dorsal extension. 3. Nerve damage: If there is nerve damage in the thumb part of the foot, it will also cause nerve conduction to be weakened, inducing obvious numbness of the thumb part of the foot. 4. Poor peripheral circulation: If the peripheral circulation in the thumb area is poor, it will also cause the blood supply of the nerves in the target area to be impaired, inducing spasms and causing numbness in the thumb. 5. Diabetes: long-term diabetes may cause microangiopathy, which may also cause damage to the peripheral nerves of the thumb, inducing numbness of the thumb of the foot. It is recommended that patients need to go to the regular hospital to receive examination, according to the results of the treatment.