Sorry to hear about your swelling parotid gland. If a stone were present, one should be able to palpate the stone manually. If the gland duct were clogged, one should be able to note periodic swelling with eating then a return to normal size (if the blockage is incomplete). I would get an opinion of an ENT physician to see what the possible etiology of the swelling might be. Just to rule out the possibilities of something bad. If the etiology is a stone or other mass, surgery is usually uneventful providing the mass has not enwrapped itself around the nerve. Good luck.
CCF Neuro MD