When it comes to brushing your teeth, there is such a thing as proper technique. Brushing too hard — or using the wrong toothbrush — can damage your teeth and gums, leading to problems like enamel wear and receding gums, which can in turn lead to tooth sensitivity, says Gene Romo, DDS, a Chicago-based dentist and consumeradvisor for the American Dental Association (ADA). “People tend to brush aggressively, thinking it’s the only way they can get their teeth to feel clean and look whiter,” Dr.Romo says. “That’s counterproductive, because not only does it cause recession of your gums, but you're also wearing away the white, glossy enamel on your teeth, making them look yellow and darker.” And when that happens, you’re putting yourself at risk for developing sensitive teeth.

Not sure if you’re brushing too hard? Take a look at your toothbrush. If you’ve been using it for three months or less, it should still appear relatively new. “If it looks beat up and flat, that’s a sign you're brushing way too hard,” Romo says.

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