The numbness of a woman’s left hand may be caused by cervical spondylosis, cerebral infarction, peripheral neuritis, transient ischemia and so on. 1. Cervical spondylosis: the numbness of a woman’s left hand may be caused by nerve compression in cervical spondylosis, due to prolonged damage to the cervical vertebrae and thickening of ligaments, resulting in nerve roots and sympathetic nerves being stimulated, resulting in compression of the neck, which can cause nerve roots to weaken the conduction, causing numbness of the hand. 2. Cerebral infarction: If the numbness of the left hand persists without relief, accompanied by limb weakness, unsteady walking, dizziness and blurred vision, etc., it may be caused by cerebral infarction, embolus blockage of the corresponding blood vessels or other causes of sensory innervation, motor ischemia and hypoxia in the brain area, which will cause damage to the central nervous system and cause numbness of the hand. 3. Peripheral neuritis: patients suffering from peripheral neuritis, may be metabolic disorders, nutritional disorders, infections and other factors, poor peripheral blood circulation, resulting in sensory deficits, leading to numbness of the hand. 4. Transient cerebral ischemia: if the patient may have cerebral atherosclerosis, the patient’s cerebral blood vessels are in a relatively narrow state, when the patient’s brain transient blood supply is insufficient, it will trigger the phenomenon of hand numbness, which can be repeated episodes, but generally within 24 hours may be completely relieved. If the symptoms are more serious, it is recommended that patients go to the regular hospital in time, under the diagnosis of the doctor, according to the patient’s specific condition performance, to take targeted treatment.