Higher blood pressure at night than during the day may be related to physiological factors, or it may be caused by autonomic dysfunction and sleep apnea syndrome. 1. Physiological factors: For example, if you are stimulated by adverse events at night, resulting in excessive mental tension and emotional fluctuations, which cause vascular nerve excitability to increase, resulting in vasoconstriction, it may cause blood pressure fluctuations and increase, resulting in higher blood pressure at night than during the day. 2. Autonomic dysfunction: this disease can lead to neurological dysfunction and dysregulation of the autonomic nervous system, especially in the case of poor sleep at night, which is likely to cause elevated blood pressure and may be accompanied by dizziness, headache and other symptoms. 3. Sleep Apnea Syndrome: As the patient snores frequently while sleeping, which leads to frequent apnea, it may cause the blood pressure to rise, thus making the blood pressure at night higher than that during the day. Higher blood pressure at night than during the day may also be caused by other reasons, if the symptoms are serious, it is recommended to seek medical treatment as soon as possible.