Low blood pressure, medically known as hypotension, is generally considered when the blood pressure reading is below 90/60 mm Hg. This means the systolic pressure (the top number) is less than 90 mm Hg, and/or the diastolic pressure (the bottom number) is less than 60 mm Hg
. Normal blood pressure typically ranges between 90/60 mm Hg and 120/80 mm Hg, so readings below this range are classified as low. However, blood pressure levels can vary from person to person, and some individuals may have readings lower than 90/60 mm Hg without any symptoms or health concerns
. Low blood pressure becomes a concern mainly when it causes symptoms such as dizziness, fainting, fatigue, blurred vision, confusion, or shock, indicating inadequate blood flow to vital organs
. In such cases, medical evaluation and treatment may be necessary. In summary:
- Low blood pressure is defined as below 90/60 mm Hg.
- It may be normal and asymptomatic in some people.
- Symptoms or complications determine the clinical significance of low blood pressure.
This threshold is widely accepted by major health organizations and medical sources.
