There are many reasons for dizziness in the afternoon, the common causes are mainly the following: 1, hypertension, after the exertion of the afternoon blood pressure is likely to rise, thus causing dizziness, headache symptoms. The symptoms can be effectively controlled by taking antihypertensive drugs such as amlodipine, nifedipine, etc. The blood pressure should be closely monitored. 2, cervical spondylosis, prolonged low head work during the day can easily lead to the onset of cervical spondylosis, causing insufficient blood supply to the vertebral artery, resulting in the symptoms of dizziness. The first thing you need to do is to pay attention to the protection of the cervical spine and avoid prolonged fixed posture, while taking cervical pellets to relieve the symptoms. 3, cerebral artery blood supply deficiency, prolonged stay in a confined environment can cause cerebral ischemia, hypoxia, resulting in cerebral artery blood supply deficiency, resulting in the symptoms of head dizziness. Appropriate activities to get up and breathe fresh air can help relieve physical fatigue, and can also improve symptoms by taking blood and brain-clearing pellets.