For the problem of numbness in the thumb, there are many clinical causes of numbness in the thumb, the most common are caused by the following conditions: for example, local trauma caused by dermal nerve injury, can appear numbness in the thumb symptoms, for such patients, usually can take oral nerve nourishing drugs to promote nerve recovery, commonly used such as methylcobalamin, the effect is very good. If the patient has lumbar spine pathology, such as lumbar disc herniation, lumbar spine slippage, lumbar spinal stenosis, lumbar spine tumor, which has obvious pressure on the spinal cord nerve, will appear numbness of the thumb symptoms, for such patients it is necessary to actively carry out lumbar spine CT, ordinary X-ray or MRI examination, clear diagnosis, and then actively carry out symptomatic treatment is completely possible.