Young people who experience sudden dizziness for several days should exclude hypotension or anemia, and need several blood pressure measurements to exclude abnormal blood pressure and routine blood tests to exclude anemia. If dizziness is accompanied by spinning, nausea, vomiting, tinnitus, hearing loss, etc., vestibular neuronitis and Meniere’s disease should be ruled out, and vestibular function tests, audiometry, and otologic examinations should be done to clarify. Some young people who experience sudden dizziness for several days, with symptoms such as loss of strength of one limb or numbness of one limb and unstable walking, are considered to have ischemic disease of the vertebrobasilar system, and need to have cranial magnetic resonance imaging and cranial vascular magnetic resonance imaging for clarification. Young people with a history of anxiety or depression may also experience sudden and persistent dizziness, and the diagnosis can be clarified based on the relevant medical history and the necessary ancillary tests.