Why is dizziness for no reason?

There are a variety of factors can lead to dizziness symptoms, such as hypertension, hypotension, anemia, hypoglycemia, orthostatic hypotension, otolith, cervical spondylosis compression nerve, etc., if you dizziness frequently, it is necessary to go to the hospital to improve the examination, such as blood pressure, blood sugar detection, etc., and then according to the situation for conditioning.