If vertigo occurs when lying down, it is usually seen in the following 3 conditions: 1. Benign positional vertigo, especially stones in the posterior semicircular canal, is most likely to occur as soon as lying down. The duration of vertigo is usually short, about 1 minute to relieve, rarely more than 2-3 minutes. 2, vestibular paroxysms, vestibular paroxysms are mostly seen when turning the head or lying down, there will be a short-lived vertigo, vertigo usually lasts about 4-5 minutes, taking Cipro, gabapentin and other drugs may be effective. 3, cervical spondylosis, cervical spondylosis patients lying down, due to the cervical posture can stimulate the vertebral artery. The change of the posture of the cervical spine can stimulate the vertebral artery and cause insufficient blood supply to the vertebral artery, which can also cause vertigo. The vertigo may last for a long time and may be accompanied by symptoms such as numbness of the limbs and neck discomfort.