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Symptom checker

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This tool helps you pick one of 8 common adult presenting complaints (such as chest pain, fever, or headache) and shows general urgency guidance drawn from patient-facing NHS, MedlinePlus, and CDC pages. It sorts the signs into three tiers: seek emergency help now, get medical advice the same day, or book an appointment within days. It never diagnoses a disease, and every result ends with: see a doctor to confirm the diagnosis.

This checker covers 8 common complaints in adults: chest pain, shortness of breath, severe headache, abdominal pain, fever, bleeding or wounds, back pain, and skin rash or allergy. For each complaint, the checker gathers the urgent warning signs as given in the NHS "when to get help" pages, the MedlinePlus page on fever and the CDC page on heart attack symptoms, and arranges them in three levels consistent with the rest of the encyclopedia's pages: "Now" (emergency), "Today" (urgent within hours) and "Within days" (not urgent). The only aim is to help you gauge the level of urgency, not to identify the disease.

The sources used here are patient pages from first-tier bodies (NHS, MedlinePlus and CDC), and the access date of each is given in the references. For each complaint the signs are shown as they appear on the source page, in the encyclopedia's own wording, without addition or guesswork: for example, the emergency signs of chest pain (pain spreading to the arm or jaw with sweating or nausea) are from the NHS page on chest pain and the CDC page on heart attack; the emergency signs of fever and the temperature thresholds (40.6 and 39.4 degrees Celsius) are from the MedlinePlus page on fever; and the signs of severe allergy (swelling and difficulty breathing) are from the NHS pages on allergy and anaphylaxis. When a source page does not give a particular level of urgency for a complaint (such as the absence of a "Today" level on the chest pain page or the wounds page), no substitute classification is invented, and that level is left without signs for that complaint.

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What is it?

This checker lets you choose one complaint from 8 common complaints in adults, then shows general warning signs sourced from NHS, MedlinePlus and CDC patient pages, classified into three levels: seek emergency help now, urgent medical advice the same day, or book an appointment within days.

This checker is a tool for gauging urgency only; it does not diagnose any disease and does not replace clinical examination, and every result it shows ends with the phrase: "See a doctor to confirm the diagnosis."

Why it matters

These patient-oriented sources advise seeking immediate emergency help for certain signs, urgent medical advice the same day for other signs, and booking a regular appointment in less urgent cases; and this checker gathers this three-level classification for eight common complaints in one place instead of searching scattered pages.

Knowing the level of urgency helps you make a quick practical decision — whether to seek emergency help now or whether it can wait — without trying to diagnose your own condition, which one of the source pages explicitly warns against.

How to use it

Choose the complaint closest to what you are feeling from the list, then read the "Now" signs first: if they apply to you, seek emergency help immediately and do not wait. If they do not apply, move on to the "Today" signs and then "Within days".

Every result the checker shows comes with its source, and always ends with the phrase "See a doctor to confirm the diagnosis", because the tool's only aim is to determine the level of urgency, not to identify the disease or suggest treatment.

When in doubt, or if more than one symptom applies to you together, choose the highest level of urgency that applies to you and act on it; and if you are worried at any level, see a doctor and do not wait.

Limits of this information

This checker covers only 8 common complaints in adults (chest pain, shortness of breath, severe headache, abdominal pain, fever, bleeding or wounds, back pain, and skin rash or allergy); many other symptoms are not included here at all.

If your complaint is not among these eight, or you are worried about it for any reason, see a doctor or contact a health advice service instead of waiting or trying to guess its urgency.

This checker is a general educational tool based on NHS, MedlinePlus and CDC patient pages, not a diagnostic tool, not a substitute for clinical examination or the doctor's judgement, and it should not be relied on alone in an actual emergency.

This checker does not mention any medicine or dose. Emergency numbers differ between countries: choose your country from the "Emergency" button at the top of the page, and with any "Now" result a button appears to call the ambulance number there.

Common questions

Does this checker identify the type of illness I have?

No. It does not diagnose any disease, but only helps you gauge the level of urgency (now, today or within days), and every result ends with the phrase "See a doctor to confirm the diagnosis".123456789101112

What if my complaint is not among the eight?

See a doctor or contact a health advice service if you are worried; this checker covers only 8 common complaints and does not include all possible symptoms.123456789101112

Should I seek emergency help immediately for "Now" signs?

Yes, "Now" signs mean seeking emergency help immediately without waiting. A button appears with the result to call the ambulance number in the country chosen from the "Emergency" button at the top of the page (the UAE by default), so make sure it is your country.1

Can more than one level of urgency apply to me at the same time?

Yes; in that case go with the highest level of urgency that applies among the signs you are experiencing, and do not wait until you are sure of all the signs.123456789101112

Questions for your doctor

  • Do my chest pain or shortness of breath call for seeking emergency help now?
  • When does my headache or abdominal pain call for medical advice the same day?
  • Does the fever I have need a doctor today or can it wait days?
  • Does the wound or bleeding I have need the emergency department or an urgent doctor?
  • What danger signs call for concern in back pain or a skin rash?

References

  1. 1 Health agencies & guidelines · Accessed 2026-10-08
  2. 2 Health agencies & guidelines · Accessed 2026-10-08
  3. 3 Health agencies & guidelines · Accessed 2026-10-08
  4. 4 Health agencies & guidelines · Accessed 2026-10-08
  5. 5 Health agencies & guidelines · Accessed 2026-10-11
  6. 6 Health agencies & guidelines · Accessed 2026-10-08
  7. 7 Health agencies & guidelines · Accessed 2026-10-08
  8. 8 Health agencies & guidelines · Accessed 2026-10-08
  9. 9 Health agencies & guidelines · Accessed 2026-10-08
  10. 10 Health agencies & guidelines · Accessed 2026-10-08
  11. 11 Health agencies & guidelines · Accessed 2026-10-08
  12. 12 Health agencies & guidelines · Accessed 2026-10-08

Review status: Edited content · Last updated:

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Educational content only — no diagnosis, and no substitute for a clinician.

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Emergency numbers

This platform is educational and must not be relied on in emergencies. If a situation is serious, call emergency services now.

UAE numbers (Police 999, Ambulance 998, Civil Defence 997) are from the official UAE Government portal, checked on 7 October 2026: u.ae. For other countries, confirm the official number where you are; numbers can vary by region.

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