If you wake up in the morning and suddenly get dizzy, you need to be alert to the following conditions: 1. Vertigo: especially benign paroxysmal positional vertigo and Meniere’s disease, two common diseases that cause vertigo, need to go to the ENT department or neurology department of the hospital. 2. Hypertension: especially middle-aged and elderly people with particularly high blood pressure, because a sudden increase in blood pressure can cause cerebral hemorrhage. 3. Cerebral infarction: especially ischemia of the posterior circulation, infarction of the brainstem, etc., which can cause dizziness and unstable walking. 4, cerebral hemorrhage: some patients with cerebral hemorrhage do not have paralysis of the limbs, but only show dizziness, and need to do cranial CT to make a clear diagnosis.