Medical misinformation and online self-diagnosis are coming under renewed scrutiny, with Associate Professor Siouxsie Wiles highlighting how relying on bad health information can delay effective treatment and potentially turn manageable illnesses into life-threatening conditions.
The microbiologist and science communicator is drawing attention to the dangers as growing numbers of people turn first to Google, TikTok, Instagram and other online platforms when they experience symptoms.
The internet has transformed access to health information, allowing people to learn about conditions, connect with others sharing similar experiences and become stronger advocates for their own healthcare.
But the same technology has created an environment where credible medical advice can sit alongside misinformation, advertising, personal anecdotes and content produced by influencers with little or no clinical expertise.
Australian doctors have recently issued an urgent warning about the scale of the problem, saying consultations are increasingly being used to correct medical misinformation patients have encountered online.
Research cited by the Royal Australian College of General Practitioners found 63 percent of surveyed teenagers received health information from social media, while 77 percent of teenagers and 79 percent of parents said it was difficult to distinguish what was true from what was false.
When a search becomes a diagnosis
Searching symptoms online is not necessarily the problem.
The danger emerges when information becomes diagnosis, and diagnosis becomes treatment without appropriate clinical assessment.
International research shows how widespread that behaviour has become. A UK survey found 48 percent of respondents had self-diagnosed using online health information at least once during the previous year, with difficulties securing timely appointments and long waiting lists among the major reasons people went looking for answers themselves.
Mental health is another significant area.
Research published by the American Psychiatric Association found 21 percent of adults aged 18 to 34 surveyed had self-diagnosed a mental health condition or symptom after encountering information on social media.
Social media can be particularly powerful because algorithms repeatedly serve users material similar to content they have previously watched.
Someone who searches for information about anxiety, ADHD or another condition can quickly find themselves surrounded by videos describing symptoms and experiences that feel familiar.
That can provide validation and community, particularly for people struggling to access professional help.
But recognition is not diagnosis.
The algorithm doesn’t know your medical history
A clinician doesn’t simply compare somebody against a checklist.
Diagnosis can involve medical history, examination, testing, medications, family history and consideration of other conditions capable of producing similar symptoms.
A social media algorithm knows none of that.
It knows what keeps someone watching.
That distinction becomes particularly important when online information encourages people to dismiss professional advice, delay treatment or experiment with supplements, restrictive diets, medications or other supposed remedies.
The commercial dimension is also raising alarm.
An analysis of 982 Instagram and TikTok posts promoting medical screening tests found 68 percent of influencers had financial interests in promoting the tests. Just 15 percent of posts discussed potential harms and only six percent mentioned scientific evidence.
That means what appears on somebody’s phone as friendly health advice may also be marketing.
Cyberchondria adds another risk
There is another side to Dr Google — sometimes searching doesn’t reassure people at all.
Repeated symptom searching can fuel what has become known as cyberchondria, where online health research increases anxiety and encourages further searching.
A headache becomes a possible brain tumour.
Fatigue becomes a serious disease.
A racing heart becomes evidence of a cardiac problem.
The more someone searches, the more frightening possibilities an algorithm or search engine can produce.
Recent survey research found 27 percent of people who had attempted to self-diagnose a mental health condition reported unnecessary stress or anxiety as a result.
Access to healthcare is part of the problem
Simply telling people to stop searching online misses an important part of the story.
People want answers.
And when appointments are difficult to obtain, specialist waiting lists are long or the cost of accessing healthcare becomes a barrier, the phone in someone’s hand becomes the fastest available alternative.
The UK research found 36 percent of respondents identified difficulties getting a timely health appointment as a reason for self-diagnosis, while 22 percent pointed to concerns about waiting lists.
That creates an important challenge for Aotearoa.
Improving health literacy and combating misinformation matter, but people also need timely access to trusted healthcare professionals.
For Māori whānau, that conversation must also recognise longstanding barriers to equitable healthcare access and the importance of services that are culturally safe, accessible and trusted.
The internet can help — but it isn’t your doctor
None of this means people should stop researching their health.
Reliable online information can help people recognise warning signs, understand diagnoses, prepare questions for their doctor and advocate for themselves or their whānau.
The issue is knowing what the internet can and cannot do.
Social media can start a conversation.
Google can provide information.
Online communities can provide support.
But none can see the complete clinical picture sitting behind an individual’s symptoms.
And Wiles’ warning brings that distinction back to something much more serious than a debate about misinformation on social media.
Bad information can produce bad decisions.
Bad decisions can delay treatment.
And when illness is involved, delay can sometimes carry devastating consequences.
Dr Google may be available 24 hours a day — but an algorithm is not a diagnosis, an influencer is not necessarily a clinician, and a viral video is not a treatment plan.
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