What I found out during a similar episode (I have one small polyp and
messed-up turbinates) is that polyps can cause recurrent sinus
infections and other difficulties and in those cases, should be treated
or removed; in other cases, like mine, where the polyp is small and not
the source of the problem, no treatment is needed.

Of course, the best source of answers is going to be a real doctor, but
if the polyps aren't causing problems and are unlikely to do so ... I
wouldn't treat them, either, even though the topical steroid spray
doesn't cause the type of problems oral steroids do.