It is also called benign positional vertigo. It is usually caused by the precipitation of calcium carbonate crystals in the ear, which stimulates the ellipsoidal and balloon sacs in charge of balance, and the patient can experience vertigo. When the patient’s head is in a fixed position, vertigo attacks can occur, and in severe cases, they are accompanied by episodes of visual rotation, usually lasting no more than a minute. The treatment of otoliths is mainly based on manual repositioning, and some patients can heal themselves. Vertigo when lying down with the back of the head next to the pillow can also be seen in cervical spondylosis, especially vertebral artery cervical spondylosis, where the protrusion of the cervical disc affects the blood supply of the vertebral artery, and the patient can have such vertigo attacks, accompanied by nausea and vomiting in severe cases.