Symptom checkers

Information about using symptom checkers safely

Symptom checkers

  • Symptom checkers are web-based tools or apps designed to help you understand what your medical symptoms could mean and guide you to the appropriate healthcare action.
  • This page provides information on online symptom checkers – what they are and tips to use them safely.
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What are symptom checkers?

As more people look online for their health information, the number of symptom checkers are growing. Online symptom checkers are web-based tools or apps that aim to help you understand your symptoms better and get advice on when to seek medical attention.

  • They ask you to input details about your signs and symptoms of sickness, along with other information such as gender and age.
  • Using computerised algorithms, the symptom checkers then give a range of conditions that might fit the problems you're experiencing.
  • They can also advise you on whether, and how urgently, you need to seek advice from a healthcare provider.


Examples of symptom checkers

There are a growing number of symptom checker apps and online. The following are a few examples.

Apps

Online, web-based symptom checkers

The symptom checkers above are from other countries and may have information that differs from New Zealand recommendations. Also, the contact information for health service advice is not appropriate for New Zealand users. The New Zealand contact for health advice and information is Healthline phone 0800 611 116.


Tips when using symptom checkers

While online symptom checkers hosted on reputable health websites may have more value than a general internet search for symptoms, they depend on the information you provide and they can miss important information. Many symptoms checkers are from other countries and may have information that differs from New Zealand recommendations. Symptom checkers may be less reliable if you have complex health problems or are on a variety of medicines. Here are some tips of how to use symptom checkers safely.

Do (✔)

  • Use symptom checkers with caution because they're only a guide. Symptom checkers don't give you a diagnosis, but they give you information about possible conditions that could explain your symptoms. They may give guidance on whether to seek help, and if so, where (eg, at your medical centre or emergency department), and indicating the degree of urgency (eg, within a few days). They can also help you prepare for an upcoming doctor’s appointment.
  • Remember, depending on your illness, injury or other health concern, there are various places you and your whānau can access healthcare. In an emergency, call 111 for advice call Healthline  0800 611 116.
  • Use symptom checkers from organisations with a good reputation, as these are usually created in consultation with medical professionals.
  • Symptom checkers rely on the answers to the questions you provide. It’s important to answer these are honestly as possible.

Don’t ( ✘)

  • Use symptom checkers if you have serious symptoms that require urgent medical attention. Call 111 immediately if it's an emergency. 
  • Rely on symptom checkers to make a diagnosis.
  • Make changes to your medicines or treatment from an app without checking with your healthcare provider first.
  • Ignore symptoms that are getting worse. Seek medical help. 

Place to go for non-urgent and urgent healthcare in New Zealand

Image credit: Health New Zealand | Te Whatu Ora

Resources

The patient's toolkit for diagnosis(external link) Society to Improve Diagnosis in Medicine (SIDM) Patient Engagement Committee

Apps

Symptom checkers

References

  1. Read J, Cain A. A literature review and meta-analysis of drug company-funded mental health websites(external link) Acta Psychiatr Scand. 2013 Dec;128(6):422-33
  2. Millenson ML, Baldwin JL, Zipperer L, et al. Beyond Dr. Google – the evidence on consumer-facing digital tools for diagnosis(external link) Diagnosis (Berl). 2018 Sep 25;5(3):95-105
  3. Semigran HL, Linder JA, Gidengil C, et al. Evaluation of symptom checkers for self diagnosis and triage – audit study(external link) BMJ. 2015 Jul 8;351:h3480
  4. Berry AC, Cash BD, Wang B, et al. Online symptom checker diagnostic and triage accuracy for HIV and hepatitis C(external link) Epidemiol Infect. 2019 Jan;147:e104

Disclaimer: The NZ Health App Library is a free consumer service to help you decide whether a health app would be suitable for you. Our review process is independent. We have no relationship with the app developers or companies and no responsibility for the service they provide. This means that if you have an issue with one of the apps we have reviewed, you will need to contact the app developer or company directly.

Factsheets – using health apps safely

How to choose a health app
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