Suddenly feel the sky spinning for the following reasons: 1, cervical spondylosis: may be caused by cervical spondylosis, cervical spondylosis is usually sudden onset, and related to the position, many people in the head or other position changes, such as from lying to sitting, or sitting to standing, if the movement is too fast, it is easy to induce this sudden feel the sky spinning. It is recommended to rest as much as possible, and to try to move slowly in the posture, so that it can be avoided. Of course, you can also use some medications to improve the symptoms of vertigo under the guidance of a doctor. After the symptoms have improved, it is recommended to have a cervical MRI, carotid ultrasound, cranial CT or MRI to further clarify whether the symptoms are caused by cervical spondylosis. 2. Other: It is also necessary to exclude some other diseases, such as benign positional vertigo and Meniere’s disease, which can also cause the symptoms of sudden spinning in the body.