Gingivitis is a condition where your gums become swollen, red, and irritated because of bacteria building up along the gum line. If you've ever noticed your gums bleeding a little when you brush your teeth, that's often an early sign of gingivitis.

Gingivitis happens when plaque (a sticky film of bacteria) accumulates on your teeth and irritates your gum tissue. Your gums might look puffy, feel tender, or bleed easily when you floss.

The good news is that gingivitis is reversible. Unlike more serious gum diseases that can permanently damage the bone supporting your teeth, gingivitis responds well to better brushing, regular flossing, and dental cleanings. If left untreated, though, it can develop into periodontitis, a more serious condition that can loosen your teeth.

Dentists take gingivitis seriously because it's both common and preventable. When your dentist reminds you to brush twice daily and floss regularly, they're helping you avoid gingivitis. It's one of those problems where a little daily effort (two minutes of brushing, one minute of flossing) prevents a much bigger hassle down the road.