A Answers (2)
Ozgen Dogan, Cardiology, answeredSome people aren't aware that they have high blood pressure because there really are no symptoms. That's why it's called the silent killer. For example, despite what many people believe, headache is not a sign of high blood pressure. That's why it's very important to have an annual checkup even if you don't have any complaints.
National Academy of Sports Medicine answeredBlood pressure is known as the silent killer because it is asymptomatic. Most individuals do not feel sick when their blood pressure is elevated. Often high blood pressure goes untreated until another medical condition arises or the individual goes in for a routine check-up.