Dizziness when lying down may be related to otolithiasis, vestibular neuritis, Meniere’s disease and other factors. When the patient’s position changes, dizziness and deafness and tinnitus can suddenly appear, and in severe cases, it can lead to nausea and vomiting and other symptoms. 1. Otolithiasis: It is related to local irritation caused by otolith dislodgment to the inner ear balance system, which manifests itself as dizziness and a feeling of rotation when the head position is changed, and can be treated with anti-dizziness medicines, such as betahistine mesylate tablets and diphenhydramine hydrochloride tablets, and other medicines. 2. Vestibular neuritis: a sudden onset of vertigo caused by damage to vestibular neurons. Clinical manifestations include vertigo, nystagmus, nausea, vomiting and other symptoms. It can be treated with antivertigo drugs such as phenylephrine and scopolamine under the guidance of doctors. 3. Meniere’s disease: a kind of auricular vertigo disease, the etiology of which is still unclear and may be related to the imbalance of endolymph production and absorption. Clinical manifestations include episodes of vertigo, hearing loss and tinnitus. It can be treated with drugs such as dihydroclavulanic acid and amphotericin under the guidance of a doctor. A lie down and get up dizziness, may also be caused by other reasons, it is recommended to go to the hospital in time to identify the cause of the disease, targeted treatment, so as not to affect the health.