Answer: Possibly. It's thought that sleeping less than six hours a night could be linked to increased blood pressure. People who sleep five hours or less a night may be at higher risk of developing high blood pressure or worsening already high blood pressure. There's also an increased risk of high blood pressure for people who sleep between five and six hours a night, although that risk is not as high as it is for people who sleep five hours or less a night. It's thought that sleep helps your blood