Numbness of the right thumb has both physiological and disease factors. Physiological factors are mostly seen in a posture pressure for too long, disease factors are seen in nerve compression, peripheral neuropathy, cerebrovascular disease and so on. 1. Physiological factors: the right thumb can be numb if it has been exposed to wind or cold for a long time, or if it has been compressed in a certain position for too long. This kind of situation will be improved after changing the environment or resting for a period of time. 2. Disease factors (1) Nerve compression: common diseases include carpal tunnel syndrome, nerve damage can cause numbness of the right thumb. (2) Peripheral neuropathy: diabetes causes peripheral vascular disease, causing poor circulation at the end of the limb, resulting in numbness. (3) cerebrovascular disease: minor cerebral infarction, cerebral hemorrhage can also appear right thumb numbness. The cause of numbness of the right thumb is very complex, if the symptoms persist, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor to improve the relevant examination, after a clear disease targeted treatment.