Low Blood Pressure

Blood pressure lower than usual. It often causes no problems, but can cause dizziness or fainting.

HeartBlood pressureLast updated: 21 October 2026

Quick Summary

Primary Symptoms

Dizziness or lightheadedness, especially on standing, fainting, blurred vision, nausea and tiredness.

Common Treatments

Treating the cause, drinking more fluids, standing up slowly, and changing medicines if they're the cause.

Risk Factors

Dehydration, some medicines, pregnancy, heart problems, infections and older age.

OverviewSymptomsCausesTreatmentFAQ

Overview

Low blood pressure (hypotension) is often normal for healthy, active people and doesn't need treatment.

It's a concern when it causes symptoms or comes from another problem, such as dehydration, bleeding, a serious infection or heart disease.

Symptoms

Dizziness

Especially when standing up quickly.

Fainting

Briefly losing consciousness.

Blurred vision

With weakness and nausea.

Shock

Cold clammy skin, confusion and rapid breathing need emergency care.

Causes & Risk Factors

Biological Causes

Many causes, including not enough fluid, blood vessels widening, heart problems or hormone problems.

Key Risk Factors

  • Dehydration From heat, vomiting, diarrhoea or not drinking enough.
  • Medicines Blood pressure medicines, diuretics and some antidepressants.
  • Age Older people are more prone to drops on standing.

Management & Treatment

01. Fluids

Drink enough water, especially in hot weather.

02. Stand up slowly

Sit up first, then stand, especially in the morning.

03. Medical review

Your doctor may change medicines or treat an underlying cause.

Frequently Asked Questions

Is low blood pressure bad?
Not always. It matters if it causes symptoms.
Should I eat more salt?
Only if your doctor advises it.
What should I do if I feel faint?
Sit or lie down with your legs raised.

Sources and further reading

Last updated 21 October 2026. For more detail, see these trusted health organisations.