Healthcare is one of the highest-stakes uses of AI, but many leadership teams discuss it as though real adoption lies in the future. A paper in Nature Health makes that position harder to defend. It analyses more than 500,000 health conversations that people had with Copilot, Microsoft’s AI assistant, in January 2026, with personal details removed. The conversations show how people already use these tools in everyday life.
Much of that use is personal. Nearly one in five conversations involved questions about personal symptoms or discussion of a condition. Requests for general health information also focused heavily on specific treatments and conditions. People are using AI to make sense of health concerns as they arise.
Timing sharpens the picture. Personal health use rises in the evening and at night, when traditional care is harder to reach. Conversations about emotional wellbeing were more than 50% higher at midnight than in the morning, and symptom questions also rose later in the day. The pattern points to people using AI when access is lower, uncertainty is higher and reassurance is harder to find elsewhere.
The device people use splits the demand again. On mobile, people asked about symptoms and managing conditions at roughly twice the rate seen on desktop, and emotional wellbeing conversations were materially higher too. The phone appears to be where people bring immediate and personal concerns, often later in the day and often in private. Desktop use leaned towards structured tasks such as research, academic support and medical paperwork. The same tool is serving very different needs, so treating them as one generic use case would flatten the patterns that product, service and design decisions depend on.
Not every question is about the person asking it. One in seven questions about symptoms and conditions concerned someone else, often a child, an ageing parent or a partner. That share of health AI use is caregiving, which brings different needs from the start. A parent describing a child’s symptoms is in a different position from someone asking about themselves. An adult trying to understand a parent’s diagnosis may need different context, cues and follow-up guidance.
