My mother was hospitalized for almost a week with headaches so severe she wanted to kill herself. She also lost vision in one eye. Started a week after a vacation to the Yucatan Penninsula. Medicos at Boston Eye & Ear Hospital were stumped. Central American janitor dude overheard them and suggested a maggot. They cut in and found it had gone to the next stage. Oh, yeah, they removed it. Instant relief from pain and vision restored. Janitor dude was fired for interrupting the doctors. All's well that ends well.
Moral of the story: wear wax ear plugs.
stay safe.