Why Do I Have a Gummy Smile?

If a good bit of gum tissue shows above your teeth when you smile, you have what dentists call a “gummy smile.” It’s extremely common, it’s almost never a health problem, and many people only notice it in photos. Still, it’s one of the questions we hear most often — so here’s what actually causes it.

What Counts as a Gummy Smile?

There’s no exact rule, but most people perceive a smile as “gummy” when more than about three to four millimeters of gum shows above the top teeth. Because it’s about proportion and perception, a smile that looks gummy on one face may look perfectly balanced on another.

What Causes a Gummy Smile?

Usually it’s a combination of a few factors, most of them simply the way your mouth developed:

• Genetics and jaw development — the size and position of your upper jaw is largely inherited.
• Excess gum tissue — sometimes the gums simply cover more of the tooth than average.
• Short or worn teeth — teeth that are small or worn down make the gums look more prominent.
• A hyperactive upper lip — a lip that lifts unusually high when you smile reveals more gum.

Is a Gummy Smile Genetic?

Often, yes. The jaw shape and gum-to-tooth proportions behind most gummy smiles are inherited, which is why they tend to run in families. That also means it’s nothing you did wrong — and nothing you need to fix unless it bothers you.

Can Anything Be Done About It?

If you’d like to change it, there are options, and the right one depends entirely on the cause. Some smiles benefit from gum recontouring, others from orthodontics, and others from veneers or crowns that rebalance tooth proportions. The first step is simply an exam and an honest conversation about what’s driving the look. Explore our cosmetic dentistry options or ask us at your next visit.