Can't spot what triggers your recurring headaches/flare-ups
“I get migraines a few times a month and my doctor asked what triggers them. I have no idea because I never tracked food, sleep, and stress together to see the pattern.”— Hacker News ↗
Condition apps like Migraine Buddy are logging-first, and people end up hand-rolling Excel dashboards to see trends. The underserved part is the analysis: 'flare-ups are 3x more likely after <5h sleep' — turning a diary into an actual trigger hypothesis.
People with recurring symptoms (migraine, IBS, allergies)
Build a symptom trigger-finder in Next.js. Daily quick-log: symptom severity (0-10) plus a few factors (sleep hours, stress, foods, weather). After enough entries, compute simple correlations and show 'possible triggers' ranked by association with bad days. First 3 steps: (1) a fast daily log form, (2) the entries store + a calendar/heatmap view, (3) a correlation pass that ranks factors by lift on high-severity days, with a clear 'not medical advice' disclaimer.