Lying in bed at night feeling very dizzy, the sky spinning, may be due to nocturnal blood pressure fluctuations, benign paroxysmal positional vertigo, vertebral artery cervical spondylosis and other reasons. 1. Nocturnal blood pressure fluctuation: nocturnal blood pressure fluctuation can lead to patients with low blood pressure during the day, while blood pressure rises at night, which will lead to patients feeling very dizzy and spinning in bed at night. 2. Benign paroxysmal positional vertigo: benign paroxysmal positional vertigo, also known as otolithiasis, is a transient vertigo that occurs when the head moves to a specific position, and it can also be manifested as the symptom of lying in bed at night and feeling very dizzy, the sky is spinning around, and in addition, it can be accompanied by nystagmus, nausea, vomiting and other symptoms. 3. Vertebral artery-type cervical spondylosis: patients with vertebral artery-type cervical spondylosis can feel very dizzy at night in bed, the sky and the earth, which may be related to the compression of the vertebral artery by the cervical vertebrae after the change of position, and the patients are often accompanied by nausea, vomiting, discomfort in the upper limbs, transient black haze, numbness in the face, and pins and needles and other symptoms. In addition to the diseases listed above, other diseases may also lead to the symptoms of feeling dizzy and spinning in bed at night, so please consult a doctor in time to avoid delaying the condition.