There may be several reasons for dizziness as soon as you lie down: 1. It may be caused by benign positional vertigo, which is often called otoliths, and generally have vertigo discomfort, and pay attention not to move too fast when lying down. If the symptoms are light, the patient does not need treatment. If there are obvious dizziness, dizziness, nausea, vomiting, etc., and frequent attacks, it is recommended that the patient go to the ENT department of the hospital for examination, or take drugs, such as flunarizine hydrochloride capsules, or can be improved by resetting by manipulation; 2. If the blood supply to the brain is not effective, there will be a lack of oxygen to the brain, which can lead to vertigo, nausea, vomiting, etc. Therefore, it is recommended that patients go to the hospital to do a cranial CT examination to clarify the cause.