Low blood pressure, also known as hypotension, is generally considered to be a reading lower than 90/60 mm Hg. This means the systolic pressure (the top number, when the heart beats) is below 90 mm Hg and/or the diastolic pressure (the bottom number, when the heart rests between beats) is below 60 mm Hg

. While low blood pressure is often not harmful and can be normal for some people, it is considered too low if it causes symptoms such as dizziness, fainting, fatigue, confusion, blurred vision, or heart palpitations. In such cases, it may indicate an underlying problem that needs medical attention

. In summary:

• Blood pressure below 90/60 mm Hg is generally classified as low blood pressure.
• It is "too low" if it causes symptoms like dizziness, fainting, or weakness.
• Some people naturally have low blood pressure without any problems.
• Persistent or symptomatic low blood pressure should be evaluated by a healthcare professional

Therefore, a blood pressure reading under 90/60 mm Hg is typically considered too low, especially if accompanied by symptoms.