There are many causes of headache after the nap, the common causes are mainly the following: First, hypertension, refers to the side pressure on the blood vessel wall during the flow of blood, mostly seen in the lunch break when the blood pressure rises, can cause vasodilatory headache, taking regular antihypertensive drugs such as amlodipine, nifedipine, blood pressure stabilization can effectively relieve the symptoms. Second, cervical spondylosis, most people like to sleep on the table during lunch break, easily induced by cervical spondylosis attack, cervical spine osteophytes can pull stimulate the surrounding blood vessels and nerves, causing insufficient blood supply to the vertebral artery dizziness, headache, take cervical rehabilitation particles, can effectively relieve the symptoms. Third, cerebrovascular spasm, if the sleep environment is noisy, sleep quality is not good easily, resulting in brain function disorders appear cerebrovascular spasm, causing dizziness, headache, without excessive treatment, get up to breathe fresh air, can effectively relieve symptoms.