Cycling at night suddenly unconscious fall may be cerebral blood supply insufficiency, hypoglycemia, cerebral hemorrhage and other diseases caused by the patient should consult a doctor in time to clarify the cause of the disease after treatment. 1. Cerebral blood supply insufficiency: cervical spondylosis, cerebral atherosclerosis and other factors cause cerebral arterial circulation disorders, the patient will have headache, sudden fainting, nausea, vomiting and other symptoms at night when riding a bicycle, this kind of people should actively search for the original cause of cerebral blood supply insufficiency, and treat the original cause of the disease. 2. Hypoglycemia: a sudden unconscious fall while cycling at night may also be caused by hypoglycemia, and the patient may also have symptoms such as panic and sweating, etc. This kind of people should eat regularly and supplement glucose in time during the acute attack period. 3. Cerebral hemorrhage: cycling at night suddenly unconscious fall may also be high blood pressure, arteriosclerosis and other factors caused by cerebral hemorrhage, such patients also have dizziness, headache, limb weakness and other symptoms, can use mannitol and other drugs, such as surgery, etc. for treatment. Cycling at night suddenly unconscious fall may also be caused by other reasons, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor for treatment. All of the above drugs should be used under the guidance of a doctor.