Vomiting is a common reason cats are booked, but it is not a diagnosis. Hair ingestion, diet changes, parasites, pancreatitis, hyperthyroidism, and kidney disease can all sit behind the same outward event. With kidney disease, nausea can rise as waste products accumulate and hydration becomes harder to maintain. With dental disease, swallowed bacteria and inflammation can contribute to a stomach that feels less settled, especially when a cat eats quickly to “get it over with.”
The household advantage is pattern recognition. Note whether vomiting is food, foam, or hair; whether it happens after meals or at random; and whether appetite is truly normal afterward. A cat that vomits and then returns to the bowl may still be losing hydration and calories over time. Compare frequency across months, not days, and bring that timeline to the appointment so the vet can separate occasional events from a chronic trajectory.