Re: Swollen Gum Neer Root Canal Tooth
It probably would NOT cause sudden death. However, if it swells up more and becomes painful, especially if you develop fever, or swollen glands on that side of the jaw, get care within 24 hours.
If the dentist said wait and see, you could probably wait and see. But start saving up for the repeat root canal, in case it becomes necessary. Meanwhile, be careful about your brushing, flossing, etc.