The Professor explains, " Sometimes certain things, such as flowers or food or dust, can cause your body to act in a strange way. You might get watery eyes, sneeze a lot, or get a rash. You might even start to cough or have breathing problems." " So Willie is allergic to spring flowers?" Minnie asks. " He could be," says the Professor. " But to be sure, he should visit a doctor, who may order an allergy test."