Afternoon headache and other discomfort symptoms, caused by the following main causes: 1, lunch break is too long, lunch break for 20 minutes, do not exceed 30 minutes, too long lunch sleep, may cause deep sleep time, causing symptoms of cerebral artery supply deficiency. 2, blood pressure abnormal, low blood pressure in the morning, high blood pressure in the afternoon, if not regularly taking antihypertensive drug therapy, may cause The main clinical symptoms are low fever in the afternoon, night sweats, coughing, coughing up blood, etc. If you do not take antihypertensive medication regularly, it may cause symptoms of cerebral artery insufficiency, dizziness and headache. 3.