Numbness in the extremities of hypertensive patients may be a precursor to a stroke. When hypertensive patients have a stroke, they will generally have partial body sensory impairment and partial body motor dysfunction, and may have speech dysfunction. There is also a possibility that numbness of the extremities in hypertensive patients may be caused by anxiety, hyperventilation, and respiratory alkalosis, resulting in numbness around the mouth and extremities. In this case, due to the patient’s anxiety, the respiratory rate increases and excessive carbon dioxide is expelled, resulting in respiratory alkalosis, which causes numbness in the extremities, perioral area and tongue.