Symptom checker: ER, urgent care or your doctor?

Written byPooja Sahu

Last Updated Oct 23, 2026

Chest pain, trouble breathing, sudden confusion and stroke signs all mean the emergency room or 911, and this free symptom checker sorts every other combination of symptoms into one of four levels of care. Tick what is happening now, choose who it is for, and the result tells you whether to call 911, go to the ER, get medical advice the same day, or watch and call your doctor if things change.

Get emergency care now if: someone is choking, not breathing or gasping too hard to speak; is unconscious or having a seizure; has chest pressure, or chest pain spreading to the arm or jaw or with shortness of breath; has a drooping face, a weak arm or slurred speech; or has lips, tongue or throat swelling fast. Call 911 instead of using the checker.

Every rule behind the four results comes from published US guidance, chiefly the National Library of Medicine’s page on when to use the emergency room and CDC’s warning-sign pages, and the full rule table appears further down this page. The checker sorts by urgency and never names a cause. When a result feels too low for how you or the person with you looks, choose the more urgent option.

How the checker sorts your answers

Each tick box is tied to one level of care, and the highest level reached by any answer becomes your result. A single 911-level sign outweighs everything else on the screen.

Source: checker rules built on the MedlinePlus emergency room guide for adults.

The four dropdowns carry less weight than the tick boxes. Rating symptoms as severe moves a routine result up to same-day care. Severe symptoms that also came on suddenly make it an ER result, because severe pain anywhere on the body is on the emergency list in that MedlinePlus guide. Duration changes the result in one case only: vomiting that has lasted several days.

There is no point score. A total can bury one dangerous sign under several harmless ones, so the result screen names each warning sign it found.

Answers stay in your browser and are not sent anywhere or saved. The download button creates a CSV file on your own device, which you can show to a nurse or doctor.

Which answers send you to 911 instead of the ER?

MedlinePlus splits emergencies into two groups: problems where you call 911 so the team comes to you, and problems where you head to the emergency department or call 911. The checker keeps that split, and every rule it uses is in this table.

Sources: MedlinePlus rows from the MedlinePlus emergency room guide for adults, except the baby row, which comes from the MedlinePlus infant fever page. CDC rows come from the CDC heart attack page and the CDC urgent maternal warning signs.

Stroke signs sit in the top group. Sudden inability to speak, see, walk or move, and sudden weakness or drooping on one side of the body, are on the MedlinePlus call-911 list. A stroke sign that has already faded still counts, and the checker handles it exactly like one that is still happening.

Chest pain on its own still means the ER

A worked example shows how the rules stack. A 52-year-old has had chest discomfort for an hour, rates it moderate, and ticks only “Chest pain.” The result is the ER. Adding “Pain in the arm, jaw, neck or back” moves it to 911, and the warning-sign box names a possible heart attack pattern.

Mild chest pain is never downgraded. The major heart attack symptoms on CDC’s list are chest pain or discomfort; feeling weak, light-headed or faint; pain in the jaw, neck or back; pain in one or both arms or shoulders; and shortness of breath. Unusual tiredness and nausea or vomiting can also occur, and women are more likely to have these other symptoms. CDC’s instruction for anyone who notices them: call 911 immediately.

So when chest discomfort arrives with nausea or a cold sweat, tick every box that applies and follow the result rather than waiting to see whether the pain grows.

Urgent care or your doctor’s office

Same-day care starts with your own provider’s office. When the office is closed, calls are often forwarded to an on-call nurse or provider, and many health plans and employers sponsor a nurse advice line (MedlinePlus). Ask whoever answers whether you should be seen in person today and, if so, where.

Urgent care fits problems that aren’t life-threatening but can’t wait for an appointment. Colds, flu, earaches, sore throats, migraines, low-grade fevers and limited rashes appear in the MedlinePlus list, along with sprains, back pain, minor cuts and burns, minor broken bones and minor eye injuries.

Emergency care can cost 2 to 3 times or more than the same visit in a provider’s office, and health plans may require a higher copayment for it. That price gap is worth weighing only when no warning sign is ticked.

Babies, pregnancy and older adults

A baby younger than 3 months with a rectal temperature of 100.4°F (38°C) or higher needs a call to the baby’s provider, and at that age the provider should be contacted before any medicine is given. The checker turns this combination into an ER result and tells you to call the baby’s doctor on the way. Children from 3 months to 17 years go through the same warning signs as adults, with a reminder on the result screen that children can show them differently.

Pregnancy, and the year after giving birth, lowers the threshold. The urgent maternal warning signs published by CDC include a headache that won’t go away or gets worse, dizziness or fainting, vision changes, a fever of 100.4°F or higher, trouble breathing, chest pain or a fast-beating heart, severe belly pain, severe nausea and vomiting, the baby moving less, vaginal bleeding or fluid leaking, swelling, redness or pain in a leg or arm, and thoughts of harming yourself or your baby. If your provider can’t be reached, the advice is to use an emergency room and tell staff you are pregnant or were pregnant within the last year.

With “Pregnant now, or gave birth in the last year” ticked, any symptom produces at least a same-day result. The baby moving less and vaginal bleeding have no tick box, so contact your provider right away if either happens.

Choosing “Adult 65 or older” leaves the rules unchanged, because the warning signs are the same at every adult age.

4 things this checker can’t do

It can’t name a cause. Sorting by urgency is all it does, and a diagnosis needs an exam and usually tests.

It can’t see emergencies tied to one condition. For a person with diabetes, very low or very high blood sugar can be an emergency even when no tick box fits, and separate pages cover severe low blood sugar and when to call 911 and DKA symptoms and when to act. A possible overdose goes to the Poison Help line at 1-800-222-1222. For the most common over-the-counter pain reliever, the signs of liver injury are described in acetaminophen liver damage symptoms.

It can’t measure anything. Temperature, oxygen level and blood pressure never reach it, and a high fever that doesn’t come down with medicine is one of the MedlinePlus reasons for emergency care.

It can’t overrule you. If you believe you or someone with you needs emergency care, go, whatever the result says.

How accurate are online symptom checkers?

At naming a cause, not very. A 2022 systematic review of 10 studies in npj Digital Medicine found the correct diagnosis listed first in only 19% to 37.9% of cases. Triage advice, meaning sending people to the right level of care, was correct in 48.8% to 90.1%, and both rates varied widely from one tool to another.

This checker skips diagnosis entirely and prints its rules on the page. It has not been tested in a published accuracy study. It applies published emergency warning signs the same way every time and leans toward more urgent care when answers are borderline.

Save 911, 988 and Poison Help in your phone today

MedlinePlus suggests storing your provider, a nurse advice line, the nearest urgent care clinic and the closest emergency department in your phone’s contacts. Three more numbers belong next to them:

• 911 for any warning sign on this page
• 988, call or text, for the Suicide and Crisis Lifeline, free and confidential 24/7
• 1-800-222-1222 for Poison Help, which connects you to your local poison center

If a child or an older relative lives with you, save the same numbers on their phone as well.

How this was made

About this content

How this article was put together: researched from recognised health sources, drafted with the help of AI tools, and edited by hand, with sources linked throughout.

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Pooja Sahu

Researched and written from recognised health sources

Dr. Pooja Sahu, MBBS, is a medical reviewer for MyMedicineAdvisor. She is a clinical physician whose experience includes serving as a Junior Resident in Nephrology at Dr. Ram…

Content on MyMedicineAdvisor is researched from recognised sources, drafted with AI assistance, and edited by hand, with sources linked so you can check them. It is general health education, not medical advice, and there is no clinical review panel.