Should i be concerned about very low bp in a 6 year old?

To answer that, I: would need to know what the actual BP is.BP's in children are often/almost always lower than the normal adult range.So, what you may be thinking is a "low BP," may in fact be normal for a 6 year old.If the BP was low for a child, they would probably have symptoms, such as lightheadedness, weakness and wouldn't feel well. If you want more detail, please re-ask your question with the actual BP#.