Low blood pressure means that the blood pressure is so low that not enough blood reaches the body parts. This causes many symptoms. Low BP is usually not a sign of any problem, but the symptoms caused by it can cause trouble. Often people complain of high BP and it is good for them to have low blood pressure. However, excessively low BP levels can cause many symptoms and problems.
Low blood pressure can be a sign of good health, but persistent low BP or sudden low blood pressure can cause serious health problems.This article explains what happens in low BP, what to do if blood pressure becomes low and when to go to the doctor for this.
(Read more - How to measure blood pressure)