Swollen gums are your mouth’s way of saying something has irritated the gum edge—most often everyday plaque. The timeline (hours vs. weeks) and triggers (food trap, flossing, hormones, or medications) help you decide what to do now and when to book a check‑in.
Daily brushing can still miss the thin rim of plaque that hides at the gumline and between teeth. With a few technique tweaks and consistent interdental cleaning, most day‑to‑day gum bleeding settles within a couple of weeks.