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Know what your symptoms mean — and when to stop waiting.

Look up any of 30 everyday symptoms to see what usually causes it, what actually helps at home, and the specific signs that mean you should call 111 or 999.

Common:HeadacheChest PainFatigueBack PainSore ThroatAnxiety
Work out what to do nextUrgent? Go straight to NHS 111

Start here

The pages people most often need. Every one covers what causes it, what helps at home, and the point at which it stops being something to wait out.

How it works

  1. 1

    Find the symptom

    Search it, or browse by the part of the body it affects. No account, no questions about who you are.

  2. 2

    See what usually causes it

    Common causes, what actually helps at home, and what tends to make it worse — written plainly, sourced from NHS and NICE guidance.

  3. 3

    Know when to stop waiting

    Every page separates three things: what a GP appointment is for, what needs 111 today, and what needs 999 now.

30
Symptoms covered
6
Body areas
12
Health guides
£0
Cost to use

All symptoms

Every page follows the same shape: what causes it, what helps, and the three levels at which you should get help.

Not sure which? Use the checker
HeadacheUsually self-careFeverMay need a GPSore ThroatUsually self-careDizzinessMay need a GPCoughUsually self-careChest PainCan be seriousShortness of BreathCan be seriousStomach PainMay need a GPNausea & VomitingMay need a GPBloatingUsually self-careSkin RashUsually self-careItchingUsually self-careFatigueUsually self-careBack PainUsually self-careMuscle PainUsually self-careJoint PainMay need a GPAnxietyMay need a GPInsomniaUsually self-careLow Mood & DepressionMay need a GPEye StrainUsually self-careEaracheUsually self-careAllergiesMay need a GPConstipationUsually self-careHeartburnUsually self-careRunny NoseUsually self-careNeck PainUsually self-careToothacheMay need a GPSwollen GlandsUsually self-carePalpitationsMay need a GPBruisingUsually self-care

Browse by body area

If you are not sure what to call it, start from where it is.

Head & Throat

Headaches, sore throat, fever, dizziness, eyes, ears

10 symptoms

Chest & Lungs

Cough, breathing issues, chest pain, heartburn

5 symptoms

Stomach & Digestion

Stomach pain, nausea, bloating, constipation

4 symptoms

Skin

Rashes, itching, bruising, dryness

3 symptoms

Muscles & Joints

Fatigue, back pain, neck pain, joint & muscle pain

5 symptoms

Mental Health

Anxiety, insomnia, low mood, stress

3 symptoms

Three things this site can do for you

No account, no payment, nothing to install.

Work out what to do next

Answer four questions about where it hurts, how long it has gone on, and whether it is getting worse. You get pointed to the right level of care — pharmacist, GP, 111 or 999.

Start the symptom checker

Keep a symptom diary for your GP

Ten minutes in a GP appointment goes fast. Log what you felt and when, then print a one-page summary to take with you. Everything stays in your browser — we never see it.

Open the diary

Tell similar things apart

Cold or flu. Heartburn or something worse. Side-by-side comparisons of the conditions people most often mix up, with the signs that separate them.

Compare conditions

Longer guides

For the questions a single symptom page cannot answer.

All 12 guides

Cold vs Flu: How to Tell the Difference

Learn the key differences between cold and flu symptoms, how to treat each one effectively, and when to seek medical help.

5 min read

When to See a Doctor: A Complete Guide

Know the warning signs that mean you should seek medical advice rather than self-treating at home.

6 min read

Why Am I Always Tired? Common Causes of Fatigue

Understand why you might be feeling tired all the time, the medical causes to rule out, and practical steps to boost your energy.

6 min read

Common questions

Still unsure about something? Get in touch — or read our editorial policy.

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Pages carry the date they were last checked, so you can see for yourself how current one is — browse the guides.