ChatGPT Spotted Addison's Disease After Doctors Blamed Anxiety for a Year

Poppy Guy, a 29-year-old teaching assistant from Fowey, Cornwall, heard the same diagnosis from her GP for a year: anxiety. As her skin began darkening to almost black and vomiting became a daily occurrence, she typed her symptoms into ChatGPT herself. The suggestion it gave her saved her life.

A Year of Visits Without Answers

Poppy Guy's ordeal began in July 2025 with nausea and slight discoloration on her arms. She saw her GP, who diagnosed anxiety and prescribed calming medication. The symptoms didn't go away, so she returned to the surgery several times over the following months, each time receiving the same diagnosis.

Between January and May 2026, her condition steadily worsened. She couldn't stand up without severe dizziness, had blurred vision, and was vomiting several times a day. Even so, every visit ended with the same conclusion from her doctor.

Every time, they sent me away saying it was anxiety and gave me anxiety medication - Poppy Guy

The Holiday That Exposed the Problem

On May 25, 2026, Poppy flew with her family on holiday to Malaga, Spain. It was there that the change in her skin color became most obvious, turning a blackish-brown shade, with patches of hyperpigmentation also appearing on her arms. After returning to the UK on June 1, her health continued to decline.

Desperate, she described all her symptoms to ChatGPT. The model pointed to Addison's disease, a rare condition in which the adrenal glands stop producing enough hormones, including cortisol. Poppy also checked the hypothesis on Google and found the symptoms matched almost perfectly.

A Diagnosis Just Before Disaster

Armed with the AI's suggestion, she went back to her GP, who this time referred her urgently to hospital. Exactly a week after leaving for her holiday, on June 8, 2026, Poppy collapsed while chopping vegetables in her kitchen. Doctors at the hospital confirmed an acute adrenal crisis, a directly life-threatening condition and a complication of undiagnosed Addison's disease.

If you hadn't come to the hospital that day, you would most likely be dead - hospital doctor

Life After the Diagnosis

Poppy spent two weeks in hospital. She now has to take 11 pills a day to replace her missing hormones, gets around using a wheelchair and a walking frame, and can manage only about 20 yards unaided. She faces a long rehabilitation, and doctors have warned that her skin discoloration may deepen further.

Asked about the case, OpenAI noted that ChatGPT is not a medical tool and should not replace consultation with a doctor. A company spokesperson stressed that the model does not make diagnoses in the clinical sense, but can only suggest directions worth discussing with a specialist.

ChatGPT is not a doctor and should never be used as a substitute for medical care, diagnosis, or treatment - OpenAI spokesperson

Why It Matters

Addison's disease can be difficult to recognize because its early symptoms, fatigue, nausea, low blood pressure, are easily mistaken for anxiety or overwork. The characteristic skin hyperpigmentation develops gradually and is often dismissed as a tanning effect. Poppy Guy's case shows that AI tools, despite clear disclaimers from their makers, are increasingly becoming a last resort for patients when the healthcare system fails to find answers for months on end.

This isn't the first such case reported in the media. Similar stories, in which AI chatbots correctly identified rare diseases after years of misdiagnosis, are becoming more frequent. Doctors and patient advocacy groups warn, however, that using AI as a first source of diagnosis carries the risk of false leads and should not replace regular medical care, even if in individual cases it has proven more effective than repeated visits to a specialist.