The most common complications that arise from low blood pressure are lightheadedness or dizziness, seeing dots within the field of vision, loss of vision, loss of hearing, a roaring sound in the ears, or losing consciousness. Low blood pressure can at times be life-threatening and may even lead to shock.

When blood pressure is too low, blood cannot be properly circulated to all parts of the body. Consequently, the cells of the human body cannot carry out normal bodily functions, and are deprived of adequate amounts of oxygen and nutrients. This can sometimes lead to brain and heart damage.

Low blood pressure weakens the heart and reduces cardiac activity. It can cause heart attacks or myocardial infarctions. It can also cause irregularities in the heart rhythm, heart valve disorders and other heart diseases. These disorders impair the heart's pumping capacity and reduce blood volume, resulting in dehydration or kidney disorders in advanced stages. Some kidney disorders weaken the kidneys' capacity to return fluid to the blood vessels, which culminates in the loss of large amounts of fluid through urination.

Finally, the first and most important organ to be affected due to low blood pressure is the human brain. When blood pressure falls too rapidly, it can be the cause of shortage of breath, cardiac pains or brain damage.