Causes of maternal hand numbness are cervical spondylosis, calcium deficiency, cold, cerebrovascular disease, as follows: 1, cervical spondylosis: when cervical disc protrusion, cervical compression sympathetic nerve, can appear on one side of the limb numbness, dizziness, headache and other symptoms, it is recommended to take a film to check whether there is cervical spondylosis; 2, calcium deficiency: maternal micronutrient deficiency, also easy to lead to the phenomenon of limb numbness, it is recommended that maternal blood to check the blood calcium, if there is hypocalcemia 3, cold: maternal unilateral limb numbness is also easy to appear after cold, the best hot compress, improve local blood circulation; 4, cerebrovascular disease: if maternal hand numbness persists, and the emergence of one side of the limb weakness, need to be alert to the occurrence of cerebrovascular disease, the need for cranial CT and MRI, early diagnosis, early treatment, the prognosis is better.