It is not normal for blood pressure to be higher at night. Blood pressure is generally lower at night while a person is sleeping and reaches a peak in the middle of the day, says Mayo Clinic. Elevated blood pressure during the night may signal a health problem.
Blood pressure follows a daily pattern. It is lowest at night, begins to rise in the morning, and peaks during the middle of the day. Abnormal blood pressure patterns may be caused by working night shifts, consuming too much caffeine, excess stress, or tobacco use, explains Mayo Clinic. Certain health problems, such as sleep apnea and kidney disease, may also cause blood pressure to rise abnormally. Anyone who suspects he has abnormal blood pressure patterns should consult with his doctor.