Odds are if you feel tired a lot with no good reason you are suffering from some level of hypertension, or high blood preasure. Fatigue is only one of the signs your blood pressure maybe high. The more signs you find the higher your blood pressure is to be. If you blood pressure stays in the high range for several checking times you will probably find that your doctor will put you on meds that you have to take everyday of your life like I do. If I had known what I faced I would have fixed the problem with a change in my diet back when I could. Now I have to live with taking meds every day and also some of the other problems that high blood pressure causes