Is low blood pressure dangerous to have?

Not necessarily: In general people who have low blood pressure live longer. However, if it is low for some bad reason, such as bleeding or infection, then it is not a good thing and could be dangerous. So it depends on the cause of the low blood pressure.

Low BP: Depending on the cause of low BP it can be. If related to dehydration, bleeding or any kind of circulatory shock - it would be very ominous. Sometimes it can be normal after a full check up if everything else is ok.

It is relative: The most important factor to label somebody has low blood pressure is to know his baseline . If somebody is having blood pressure of say 80/50 mmhg for years and does not have any symptom at all . This should not be considered necessarily a bad idea . On the other hand if a person who had blood pressure of 140 /90 came to you with blood pressure of 80/60 , it should be cause for conmen.

Depends: Low blood pressure is only dangerous if it is impairing adequate oxygen delivery to meet the needs of vital organs of the body, or if it signifies an underlying process that is dangerous if it worsens (e.g. Diffuse bacterial infection, or toxin poisoning). The actual number, in and of itself, is not dangerous if all organs remain working fine.

Yes: But only if it's really low. Another way to look at it is this: no one dies while their BP is high. All people who die have low BP at the end. That said, if you're otherwise healthy and your BP is on the low side, it's a sign of health, not disease!

Low BP: It's a problem when you become symptomatic - fainting, dizziness, blurred vision etc... Most young people can tolerate low bp.

Depends: BP varies from person to person and even hour to hour. However if it drops too rapidly, it signals something being wrong with your cardiovascular system. When the pressure drops rapidly or gets low enough, there may not be enough blood going into the organs especially the brain. The end result may be fainting, shock, and even death.