Low blood pressure is a reading of less than 90/60mmHg. It does not always cause symptoms, but you may need treatment if it does.
Symptoms of low blood pressure

Get your blood pressure checked if you keep getting symptoms like:

lightheadedness or dizziness
feeling sick
blurred vision
generally feeling weak
confusion
fainting

This might mean your blood pressure is too low.

If you get symptoms when you stand up or suddenly change position, you may have postural hypotension.