Self-diagnosis on the Internet / Cyberchondria

What Is Self-Diagnosis on the Internet? What Is Cyberchondria?

Self-diagnosis refers to the process in which people draw diagnostic conclusions about their own physical or mental health without professional assistance. Online, this can happen through search engines (you have probably heard of “Dr. Google”), symptom-checker apps, AI chatbots, or increasingly through social media videos.

Cyberchondria (also known as “Google disease”) is a particular form of health anxiety in which concerns about one's health are intensified through repeated and extensive internet searches. It is not considered an independent medical diagnosis, but rather a pattern of behavior and distress that is closely related to hypochondria (a persistent, unfounded fear of suffering from a serious physical illness) / illness anxiety disorder. A vicious cycle is typical: the search is intended to provide reassurance, but instead leads to further uncertainty and more searching.

An important distinction: While cyberchondria traditionally refers to fears about physical illnesses (cancer, MS, etc.), the more recent social media trend primarily concerns self-diagnosis of mental health conditions (ADHD, autism, borderline personality disorder, depression, and others).

The phenomenon is actually widespread. According to a representative Bitkom survey (1,144 people aged 16 and over, published January 9, 2023), 62% of internet users search for information about their symptoms online or via an app in preparation for a doctor's appointment, and this trend is increasing. Another study — a Canadian pilot study conducted by FEMAP / the University of Western Ontario — found that among 56 young patients who had recently started treatment for mood and anxiety disorders, 71.4% suspected that they had a diagnosis that had not been made by a professional. Social media was involved in 65% of these cases. (Important: This was a small clinical sample and not a representative survey of young people.)

Why Do So Many Young People Do This?

The social media algorithm: If you watch videos about a particular topic until the end or like them, TikTok and Instagram will show you similar content. This can quickly create the impression: “Hey! This applies to me too.” # Link to similar article

Identity exploration among adolescents: Adolescence is the central stage of identity development: young people experiment with different roles and forms of belonging and are particularly sensitive to labels and classifications. A diagnosis can provide an explanation, structure, and a sense of belonging to a community. People who share their struggles online often receive positive reactions, attention, and encouragement. This exchange can create a sense of belonging and contribute to reducing stigma.

Structural problems / long waiting times: According to the German Federal Chamber of Psychotherapists (BPtK) study Wartezeiten 2018 (“Waiting Times 2018”), which involved more than 9,000 participants, “the average time from the first request to a psychotherapist to the start of treatment is around 20 weeks.” For children and adolescents, waiting times have nearly doubled since the beginning of the pandemic, reaching around 25 weeks. Understandably, people who have to wait that long for help look for answers online.

How Much Misinformation Is Actually Circulating? (Selection from Various Studies)

Canada, 2022 (Yeung et al., Canadian Journal of Psychiatry): Of the 100 most popular ADHD TikToks, 52% were misleading, 27% consisted of personal experiences, and only 21% were useful. Forty-nine of the 52 misleading videos came from non-professionals; only 11% of the videos were produced by healthcare professionals.
Germany, 2026 (University of Duisburg-Essen / LVR University Hospital Essen, Clinical Psychology in Europe): 177 German-language videos covering ADHD, depression, autism, anxiety disorders, narcissism, and PTSD, with around 94 million views, were analyzed. Only 19.2% were classified as accurate, 33.3% as false, 18.1% as overgeneralized, and 29.4% as purely personal experiences. Videos created by professionals were significantly more reliable than those created by laypeople or “coaches.”
UK, 2025/26 (University of East Anglia / Norwich Medical School): A systematic review of more than 5,000 posts (Dr. Alice Carter, Dr. Eleanor Chatburn) summarized according to media reports in March 2026: “When we looked closely at TikTok content, studies reported that 52 per cent of ADHD-related videos and 41 per cent of autism videos analysed were inaccurate” — “By contrast, YouTube averaged 22 per cent misinformation, while Facebook averaged just under 15 per cent.” Individual misinformation rates were “as high as 56%.”
Independent sample (Guardian, 2025): An analysis commissioned by the Guardian of the top 100 videos under #mentalhealthtips, reviewed by psychiatrists and psychologists, found that “52 out of 100 videos offering advice on dealing with trauma, neurodivergence, anxiety, depression and severe mental illness contained some misinformation.”
A JMIR study (JMIR = Journal of Medical Internet Research) from 2025 also showed that a high proportion of commenters identified with the symptoms shown — a mechanism that can contribute to misdiagnosis. The Harvard Petrie-Flom analysis points out that around half of the creators examined were selling products or coaching services without being licensed professionals.

What Risks and Dangers Are There?

Misdiagnosis and overlooking a genuine illness: Symptoms such as concentration problems can indicate ADHD, but they can also be caused by anxiety disorders, trauma, depression, or physical conditions (e.g., thyroid problems).
Unnecessary anxiety / cyberchondria / the nocebo effect: Negative expectations can have real physical effects and may interfere with recovery.
Incorrect self-treatment and delayed professional treatment: People may start ineffective or harmful self-treatments or delay starting appropriate therapy.
Defining one's identity through a (mis)diagnosis / “therapy speak”: Terms such as trauma, toxic, narcissist, trigger, and OCD are increasingly used casually; ordinary human experiences can become pathologized.
Social contagion — “TikTok tics”: During the pandemic, tic specialists around the world observed an increase in sudden tic-like behaviors, particularly among adolescent girls. Kirsten Müller-Vahl et al. described the phenomenon in Brain (Vol. 145, Issue 2, February 2022; published online in 2021) under the title “Stop that! It’s not Tourette’s but a new type of mass sociogenic illness”: “We report the first outbreak of a new type of mass sociogenic illness that in contrast to all previously reported episodes is spread solely via social media.”

Can Self-Diagnosis or Researching Medical Conditions Also Have Benefits?

Yes — a balanced perspective is important:

Better health literacy and information: When people research correctly, they can often improve their knowledge about their own health conditions, as well as those of family members or friends.
Reducing stigma and breaking taboos: Hashtags such as #notjustsad have given people affected by mental health problems a voice. The German Federal Ministry of Education and Research and experts partly attribute the increased willingness to seek treatment to reduced stigma.
Encouragement to seek professional help: For some people, social media is the first place where they realize that they are not doing well, making them more willing to seek help or start therapy.
Sense of community: Online communities can help people cope with difficulties and provide advice on how to deal with them.

However, one thing remains crucial: A self-diagnosis can never replace professional assessment.

How Should I Handle Health Information on the Internet?

Criteria for reliable sources include:

Who is behind it? Check the provider in the legal notice or “About Us” section. Independent, non-profit, or government organizations are generally reliable. Terms such as “institute” or “academy” are not protected titles.
Independence: Be cautious with pharmaceutical, medical technology, or food industries and with websites that sell products.
Evidence: Reliable content cites scientific sources and studies.
Balance: Both benefits AND risks are presented; there are no claims of cures or “guaranteed effects.”
Up-to-date information: Check the publication/update date; articles more than three years old may be outdated.
Search ranking does not equal quality: The first Google results (often marked as “Ad”) are not necessarily the best.
Quality seals such as HONcode, afgis, or the criteria of the German Network for Health Literacy (DNGK) can provide guidance.

Especially on social media: Content from licensed doctors and psychotherapists is significantly more reliable than content from laypeople or “coaches.” Symptom lists are often so general that they can apply to almost anyone. When using AI chatbots, ask for sources and critically evaluate the answers.

Symptom-checker apps: Their reliability varies greatly. A British study from 2015 found only 58% correct diagnoses; a 2016 Harvard study showed that doctors were more than twice as likely to arrive at the correct diagnosis as apps (top diagnosis: 72.1% vs. approximately 34%).

AI: A small field experiment: I asked an AI tool based on GPT-5.5 which conditions I might have because I was currently experiencing loss of appetite, lack of motivation, difficulty concentrating, and sleep problems. How many conditions do you think the AI tool identified based solely on these symptoms? One, two, five? Not quite — 39. So if AI is used in such cases, it should only be used to narrow down possibilities and with an appropriate level of detail (How long? How severe? Progression over time? etc.).

What Should I Do If I Think I Have an Illness?

The first point of contact should be your family doctor (or pediatrician/adolescent physician), partly because psychological symptoms can have physical causes (KV Bremen). If a mental health condition is suspected, the doctor can refer you to specialists or psychotherapists.

Why a professional diagnosis is important — and how it works (example: ADHD): According to clinical guidelines and ADHD specialist resources, a proper diagnostic assessment includes:

Initial consultation / preliminary assessment,
Medical examination to rule out physical causes,
Detailed medical history, often over several appointments (including childhood development; in the case of ADHD, symptoms must have been present before the age of 12),
Collateral history (parents, partner, old school reports),
Standardized questionnaires/tests (e.g., DIVA),
Feedback and treatment recommendations.

A 60-second video or an online test cannot provide this. Mental health conditions are complex and need to be professionally differentiated (depression vs. anxiety vs. trauma vs. autism — all of which can involve some similar symptoms).

Where Can I Get Help?

Nummer gegen Kummer – Child and Youth Helpline: 116 111 (also 0800 111 0 333). Free and anonymous, Monday–Saturday, 2–8 p.m.; on Saturdays, young people can receive advice from other young people. Online counseling (email/chat) is also available via nummergegenkummer.de. Parent helpline: 0800 111 0 550.
krisenchat.de: Free, anonymous counseling via chat (WhatsApp, SMS, and web chat) for everyone under 25, available 24/7 and provided by trained professionals.
Caritas: Free, anonymous online/email counseling for people under 25 experiencing crises or suicidal thoughts, provided by trained peers of a similar age; www.u25-deutschland.de.
TelefonSeelsorge: 0800 111 0 111 and 0800 111 0 222 (as well as 116 123), free, anonymous, and available 24/7; chat and email counseling are also available via telefonseelsorge.de.
Family doctor as the first medical point of contact.
Appointment Service Center of the Association of Statutory Health Insurance Physicians: 116 117 (also available online via 116117-termine.de and the app), available 24/7; among other things, it arranges appointments for initial psychotherapeutic consultations (no referral required).
gesund.bund.de: The German federal government's official national health portal — free of advertising and quality-assured.
Stiftung Gesundheitswissen (stiftung-gesundheitswissen.de): Independent, evidence-based health information.
BzgA/BIÖG: Includes the “Ins Netz gehen” (“Go Online”) campaign (ins-netz-gehen.de) on media use and mental health, as well as the J1 health check-up (j1-info.de).
Emergency: In an acute life-threatening situation, call 112 (ambulance/emergency medical services) or 110 (police).