The elderly are susceptible to problems maintaining a stable blood pressure. While high blood pressure is more common, some elderly adults suffer from chronic or intermittent low blood pressure.

High blood pressure can be a serious condition that affects as much as one quarter of the world's population but is extremely treatable through medication, diet or lifestyle changes. Chronic elevation of blood pressure is a risk factor for many diseases and can lead to a decreased life expectancy.

Low blood pressure or hypotension can refer to any blood pressure below the established normal of 120/80 mmHg as per the American Heart Association.

While most people are more concerned about their blood pressure being too high, an abnormally low blood pressure can also cause problems. Normal blood pressure is less than 120/80 mmHg, but a level less than 90/60 is generally considered too low.

Amniotic fluid is the fluid that surrounds your baby in the womb.This clear-colored liquid protects the baby and provides it with fluids, reports the March of Dimes. Your baby breathes and swallows amniotic fluid. The medical term for low fluid is oligohydramnios.

Low-carb diets restrict the daily intake of carbohydrates, but allow an unlimited intake of fat and protein. If you observe a low-carb diet strictly, this could lead to an increased secretion of stress hormones. In excess, stress hormones can give rise to heart palpitations and low blood pressure.

Drinking tea can raise your blood pressure, but the spike is normally temporary and peaks 45 to 90 minutes after ingestion, according to the "American Journal of Hypertension,"

Recently, there has been evidence that chocolate may lower blood pressure. However, that's not to say that it can't cause a rise in blood pressure as well. How chocolate affects you depends on your sensitivity to the ingredients in it, as well as the amount you eat.

Research shows drinking too much wine raises your blood pressure. It raises your blood pressure right away temporarily, according to the Mayo Clinic, but repeatedly drinking too much can raise your blood pressure long-term. On the other hand, some studies suggest wine protects against heart disease.

A sudden drop in blood pressure can be due to a change in health or certain medications, but as long as there are no symptoms, it is generally is not a concern.

Low blood pressure, also known as hypotension, can trigger symptoms in people such as dizziness and fainting. In addition, a low blood pressure may mean that your brain and organs are not receiving sufficient amounts of nutrients and oxygen.

Feeling faint or lightheaded without losing consciousness is called presyncope. The condition may cause you to feel nauseous and clammy as well as lightheaded. Presymcope usually is caused by a drop in blood pressure or a heart arrhythmia that reduces the amount of blood pumping from your heart.