Why Do My Gums Bleed When I Brush?

Should I stop flossing if my gums bleed?

No. It feels logical. It bleeds, so you stop. But if you've just started flossing, your gums may bleed at first while they get used to it, and the American Dental Association says that usually goes away on its own in about a week. If it keeps going past that, it isn't your gums adjusting anymore. It's your gums asking to be looked at.

What causes gums to bleed when you brush?

The American Dental Association lists several usual reasons: gingivitis, starting a new flossing routine, pregnancy gingivitis, blood thinning medications, and brushing too hard. That last one surprises people. Scrubbing harder doesn't clean better. The ADA recommends an extra-soft or soft-bristled toothbrush, and a gentle hand. If you take a blood thinner and the bleeding doesn't stop quickly, let your physician know too.

From the outside, all of these can look exactly the same. A little pink in the sink. That's why the cause matters more than the bleeding itself, and why it's worth having someone look. A little pink in the sink is one of the most useful things a patient can tell me.

What is gingivitis, and can it be reversed?

Gingivitis is the early stage of gum disease. It's caused by plaque buildup, that soft film on your teeth, and your gums can get red and swollen and bleed easily. Now, the good news. The American Dental Association calls gingivitis reversible and preventable, and the National Institute of Dental and Craniofacial Research, part of the National Institutes of Health, says early gum disease can often be reversed with daily brushing and flossing. The boring things, done consistently.

When do bleeding gums become periodontitis?

When the problem moves past the gums and into the bone that holds your teeth in place. Think of your teeth like fence posts, and the bone like the soil around them. Gingivitis is trouble on the surface. Periodontitis is the soil starting to wash away. Left untreated, gum disease can spread to the bone that supports your teeth. The National Institute of Dental and Craniofacial Research lists signs of gum disease that include gums pulling away from the teeth, loose or sensitive teeth, pain when chewing, and bad breath that won't go away. Once it reaches that point, you'll need treatment from a dentist or dental hygienist.

How common is gum disease in adults?

Very common. The CDC reports that about 42 percent of American adults 30 and older have periodontitis, and about 8 percent have severe periodontitis. Those numbers come from a large national survey in which examiners measured people's gums directly. So if you're reading this and recognizing yourself, you're in very large company. Common isn't the same as normal, though. It's just common.

Who is most at risk for gum disease?

The single biggest risk factor is tobacco. The National Institute of Dental and Craniofacial Research calls smoking or using tobacco products the most significant risk factor for gum disease, and says it can also delay healing and make treatment less successful. The CDC links poor oral hygiene, diabetes and smoking to serious gum disease, and also lists stress, genetics, and hormonal changes such as pregnancy or menopause.

Some of those you can't change. You can't choose your parents. But that's exactly why the ones you can change matter more. The ADA recommends brushing twice a day and cleaning between your teeth once a day, and not smoking matters too. They're small things. Done for years, they're not small at all.

Is gum disease linked to heart disease?

This is where a lot of what you read online goes too far, so let me be careful. The two are linked, meaning they tend to show up in the same people. But in a scientific statement published in December 2025, the American Heart Association said causality has not been established, and that more trials are needed to know whether treating gum disease improves heart outcomes. The AHA reached the same conclusion on causation back in 2012. So take care of your gums for your gums' sake. If someone promises you more than that, be a little suspicious.

What happens when we check your gums?

Here at our Manalapan office, the hygienist uses a small, thin instrument to gently measure the pocket between each tooth and the gum around it. Shallow pockets are healthy. Deeper pockets tell us gum disease has settled in. If the pockets are too deep for a regular cleaning to reach, the next step is scaling and root planing, which the American Dental Association describes as a deep cleaning below the gumline used to treat gum disease. Afterward, we schedule another visit to check how your gums healed. Measuring can feel a little tender if your gums are inflamed, and the ADA notes your teeth may be sensitive for up to a week after a deep cleaning.

If your gums have been bleeding for more than a week or two, that alone is a good reason to be seen.