The reasons for dizziness in the evening include the following: 1, overwork: if overwork during the day, resulting in a lack of energy at night, which in turn produces dizziness, lightheadedness symptoms. In addition, overwork during the day can make the blood pressure at night appear larger fluctuations, including the increase and decrease of blood pressure, will cause dizziness symptoms; 2, cervical spondylosis: if the daytime work at work for a longer period of time, resulting in cervical spondylosis to the night aggravation, resulting in insufficient blood supply to the brain, then it can lead to dizziness, headache, headache symptoms; 3, cerebral vascular stenosis: if there is a stenosis of the cerebral blood vessels, resulting in poor cerebral blood supply, resulting in insufficient cerebral blood supply in the evening. Insufficient blood supply to the brain at night, which in turn triggers dizziness and headache.