If you need to visit urinal frequently in the night, get your blood pressure checked as researchers say it may be a sign of hypertension.

"Our study indicates if you need to urinate in the night -- called nocturia -- you may have elevated blood pressure and/or excess fluid in your body. If you continue to have nocturia, ask your doctor to check your blood pressure and salt intake," said study author Satoshi Konno of Tohoku Rosai Hospital in Sendai, Japan.