The causes of headaches from looking at cell phones include cervical spondylosis, visual fatigue, migraine, and insufficient blood supply to the head. 1. Cervical spondylosis: long time looking down at the cell phone will aggravate the condition of patients with cervical spondylosis, resulting in headache, stiff neck, upper limb pain and numbness and other discomforts. 2. Visual fatigue: prolonged viewing of cell phones can easily cause visual fatigue, visual fatigue can lead to headaches, dizziness and other discomforts. 3. Migraine: long time looking at the cell phone or looking at the cell phone at night, the light of the cell phone screen may induce or aggravate the patient’s migraine, causing headache, dizziness, tears, nausea and other discomforts. 4. Insufficient blood supply to the head: Watching cell phone with incorrect posture, such as bowing, bending over, lying on the table, too long, will cause spasms in the neck muscles, thus affecting the blood supply to the head, causing headache discomfort. Appear looking at the cell phone headache should stop looking at the phone, and appropriate rest to relieve the symptoms. If the headache symptoms continue to be unrelieved, you should seek medical attention, clear reasons, give targeted treatment.