Some people say there's no such thing as a "low blood pressure." Some even insist that low blood pressure indicates excellent health. But the more common belief is that blood pressure below the normal range of 120/80 may result in fatigue and weakness, though this has yet to be proven in the world of medicine.

Blood pressure in the normal range is rare. Either the systolic or the diastolic reading is liable to show lesser than the normal range in most individuals. When blood pressure is normal or lower than normal, chances of heart attack are considerably lesser. Also, ailments relating to kidney and liver are uncommon unless due to other external causes such as smoking or alcohol. This is the reason many consider low reading to be an indication of excellent health.

Low blood pressure may sometimes result in fatigue, weakness, and even depression. However, this has not been proven. Research, however, does indicate that individuals having a steady low blood pressure tend to weigh less and be short in stature compared to those with a normal reading. These individuals don't necessarily suffer from weakness or fatigue.

Often, chronic fatigue sufferers are misdiagnosed with low blood pressure, as symptoms are the same.

Some instances of low blood pressure may be observed during the day as pressure fluctuates according to activity. These low systolic and diastolic readings cannot be considered as low blood pressure. It is only when there is a steady low reading for a specific period of time that the individual may be diagnosed with low blood pressure.