Blood pressure ranges are incredibly important to understand for people with or without blood pressure issues. In most simplistic terms, blood pressure is the force exerted on the walls of bodily arteries by circulating blood. The most favorable blood pressure levels are less than 120/80, or one hundred twenty over eighty. If blood pressure becomes higher than this number, than a person may be in the mild, moderate or severe high blood pressure ranges. The higher blood pressure ranges need to be treated with medicines or they will be severely detrimental to a person's health. While high blood pressures are not to be taken lightly, it is important to understand that at certain times, a person's blood pressure can reach higher numbers without too much concern involved. For instance, blood pressures will be naturally higher when a person is physically exerting themselves. However, if a person's blood pressure is high while at rest, it means that their heart is overworked and their artery walls have unneeded extra stress being exerted upon them. Of course it is also important to remember that low blood pressure is just as much of a problem as high blood pressure, so it is wise to know blood pressure guidelines. Below normal blood pressure numbers will hypotension, or low blood pressure. Normal blood pressure ranges from 90-119/60-79, or ninety to one hundred nineteen over sixty to seventy-nine. Therefore, low blood pressure ranges will be below these normal blood pressure ranges. Pre-hypertension ranges, or mild blood pressure ranges, will be anywhere from 120-139/80-89, or one hundred twenty to one hundred thirty-nine over eighty to eighty-nine. Stage one hypertension, or moderate blood pressure ranges, will be from 140-159/90-99, or one hundred forty to one hundred fifty-nine over ninety to ninety-nine. Stage two hypertension levels, or severe blood pressure levels, will range anywhere 160/100, or one hundred sixty over one hundred, or higher. It is critically important to know these levels, especially if you have a personal or family medical history of blood pressure problems. Even if you have never had blood pressure problems personally, it is important to know these numbers for future reference. Blood pressure can be measured with certain medical devices that can be purchased in many stores, so be sure to invest in an instrument to measure your own blood pressure in the future if you have not done so already.