Why is blood pressure high at night?
Disease description:
My blood pressure tends to be high at night, and it's somewhat lower during the day. I'd like to know why this happens.
Doctor's answer (1)
Dr. Tian Hongbo
Nighttime blood pressure elevation, also known as nocturnal hypertension or a non-dipping blood pressure pattern, refers to a phenomenon where a patient's blood pressure does not decrease by the usual 10%–20% during nighttime sleep, but instead rises. This condition may be related to multiple factors:
1. Staying up late, work-related stress, and poor sleep quality may cause the body to remain in a state of tension for prolonged periods, leading to elevated nighttime blood pressure.
2. Obstructive sleep apnea-hypopnea syndrome is also a common cause of nighttime blood pressure elevation. Hypoxia caused by apnea activates the sympathetic nervous system, resulting in increased blood pressure.
3. Lifestyle habits: Consuming excessive salt, caffeine, or alcohol in the evening, as well as a lack of physical activity, may contribute to elevated nighttime blood pressure.
4. Medication effects: Certain medications, such as hormonal drugs and nonsteroidal anti-inflammatory drugs (NSAIDs), may interfere with the normal rhythm of blood pressure.
5. Medical conditions: Kidney disease, endocrine disorders (such as hyperthyroidism), and cardiovascular diseases may also lead to abnormal nighttime blood pressure.
If you have concerns, it is recommended to seek medical advice promptly.
