Symptom differential
Pick the symptoms you have, and the tongue and pulse if you know them. The catalogue's conditions and TCM patterns are ranked by how well they fit — rarer symptoms count for more — and the tool suggests the question that would best tell the leading patterns apart.
Tongue and pulse
A sign a pattern records counts for it; one that opposes what the pattern records (pale vs red, slow vs rapid) counts against it. The sign list and its oppositions are awaiting clinical review.
This ranks which catalogue pages list the symptoms you picked. It is not a diagnosis: many symptoms have causes the catalogue doesn't cover, and a persistent or severe symptom warrants a qualified healthcare provider.
How the order is worked out: each symptom counts for more the fewer records list it, and a record that lists a great many symptoms is scaled down so it can't win on breadth alone. Every row shows the symptoms that put it there.