Neuron Structure. Your brain is made of approximately 100 billion nerve cells, called neurons. Neurons have the amazing ability to gather and transmit electrochemical signals -- think of them like the gates and wires in a computer.
Most doctors will only consider chronically low blood pressure as dangerous if it causes noticeable signs and symptoms, such as: 1  Dizziness or lightheadedness. 2  Nausea. 3  Fainting (syncope)  Dehydration and unusual 1  thirst. Dehydration can sometimes cause blood pressure to drop.  Lack of 1  concentration. Blurred vision.  Cold, clammy, pale skin.
If your low blood pressure is accompanied by other symptoms, or if you had normal or even high blood pressure and now you suddenly have low blood pressure, you should seek medical attention. If you experience any of the following symptoms with low blood pressure, call your doctor: Dizziness; Fainting; Difficulty concentrating; Blurred vision; Nausea