What Is Normal Low Blood Pressure?

Blood pressure changes with posture, hydration, meals, exercise, stress, temperature, and medicines. A reading that is low for one person may be usual for another. The number matters less than whether it is a new change, repeatedly low, or linked with dizziness, fainting, blurred vision, weakness, nausea, or unusual tiredness.

A sudden fall can occur with dehydration, blood loss, infection, heart problems, or a medicine effect. Low readings on standing may point to a postural problem. A clinician will consider your usual readings, pulse, symptoms, examination, and medicines together.

Rise slowly from bed or a chair, drink fluids regularly unless you have been told to restrict them, and avoid standing still for long periods. Keep a record of readings with the time, position, symptoms, and medicines taken. Arrange a GP Consultation if readings are newly low, symptoms recur, or you have started a medicine that may lower blood pressure. Do not stop prescribed treatment alone.

Call emergency services for fainting with chest pain, severe breathlessness, confusion, signs of stroke, heavy bleeding, or cold clammy skin. Seek prompt assessment after a collapse, for persistent vomiting or diarrhoea, or when you cannot keep fluids down. Arrange routine review for recurring Dizziness, falls, or symptoms that appear after standing.

Ask whether your reading is low for you, whether blood pressure should be checked lying and standing, and whether any medicine or illness could explain the change. Ask how to monitor at home and which symptoms should trigger urgent help.