March 30, 2022

Why Your Gums Bleed When Flossing

The most common cause is a buildup of plaque, bacteria and tartar

Person removes dental floss from container while standing over a bathroom sink

Flossing is an essential part of your oral health. In addition to brushing, flossing every day can help remove plaque buildup before it hardens into tartar.

Advertisement

Cleveland Clinic is a non-profit academic medical center. Advertising on our site helps support our mission. We do not endorse non-Cleveland Clinic products or services. Policy

But is it normal for your gums to bleed when flossing?

If you don’t floss regularly, your gumline may become irritated, inflamed and swollen. Bacteria, tartar and plaque can build up along your gumline. When that happens, your gums might start looking unhealthy and you may notice your gums pulling back from your teeth. You may also see blood when flossing or even brushing.

Periodontist Sasha Ross, DMD, shares why you might see blood and how to floss properly.

Common reasons for gums to bleed while flossing

So, why are your gums bleeding? There are a few reasons you may have noticed some pink in the sink.

Periodontal disease

The most common reason your gums are bleeding? Periodontal disease, which, if caught in the early stages, is reversible with treatment.

“The inflammation may be caused by bacterial plaque or tartar that is caught beneath the gum tissue,” says Dr. Ross.

Your dentist will do a professional cleaning to remove plaque and tartar. Your gums should heal on their own, and if proper oral care is followed at home, no other treatment should be needed.

But if your periodontal disease is advanced, you may start losing some of the bone supporting your teeth. In some cases, you may lose your teeth. Advanced periodontal disease can also increase your risk for health issues like diabetes, heart disease, lung disease, stroke and arthritis.

Change in hormones

If you have a menstrual cycle, you may notice a change in your gums. This can also happen if you:

  • Are going through puberty.
  • Take birth control.
  • Are pregnant.
  • Are going through menopause.

The influx of hormones like progesterone can increase blood flow, which can lead to inflamed or bleeding gums.

“The hormones can also cause changes in blood vessels and in your body’s immune response that cause bleeding gums regardless of the amount of bacteria and plaque present,” Dr. Ross explains. “The best way to control the bleeding gums is to be as diligent as possible cleaning your teeth, particularly near the gumline, and to see your dentist regularly for professional teeth cleanings.”

Advertisement

A medical condition

Certain medical conditions can cause your gums to be more likely to bleed when you brush or floss.

For example, vitamin C or K deficiencies can trigger bleeding. Vitamin C helps your tissue grow and repair. Vitamin C also strengthens your bones and teeth. Vitamin K, on the other hand, helps your blood clot.

Your doctor can test you for vitamin deficiencies. You can also try adding vitamin C-rich foods like citrus fruits, strawberries and broccoli or vitamin K-rich foods like spinach and kale to your diet.

“Bleeding may also be a sign of a systemic condition like diabetes that is not well-controlled or has not yet been diagnosed,” says Dr. Ross.

In addition to diabetes, other medical conditions that can affect your gums include leukemia and hemophilia.

Flossing or brushing the wrong way

How soft the bristles are on your toothbrush can affect your gums. If the bristles are too hard or you apply too much pressure, you can cause your gums to bleed. Opt for a toothbrush with extra soft or soft bristles.

Old toothbrushes, where the bristles are worn down, may also make you press harder than you should. Be sure to replace your toothbrush every three months or when the bristles fray.

How you floss can have an effect on your gums, as well. You want to make sure you’re gentle and focus on working your way up and down the curve of each tooth.

“Brushing at least twice per day, with one time being for 2 whole minutes, is recommended,” says Dr. Ross. “I would recommend purchasing an electric toothbrush, as studies have shown them to be more effective than regular toothbrushes.”

Electric brushes often come with timers to help you track how long you’ve been brushing. They also have alarms that indicate when you’re brushing too hard.

Remember to discuss with your dentist and dental hygienist how to properly floss to get the best result and healthiest teeth and gums.

Advertisement

Is it normal for your gums to bleed?

Your gums may bleed from time to time. And most times it’s not serious. But if your gums bleed regularly, you should see your dentist.

Dr. Ross recommends seeing your dentist at least twice per year for cleanings, X-rays and dental examinations. During your visit, your dentist will do an oral cancer screening and look for cavities and broken teeth. They’ll also do a periodontal evaluation to determine how healthy your gums are and whether you need a different, deeper type of teeth cleaning.

“If you have concerns about bleeding gums, you can ask your dentist to refer you to a periodontist (gum disease expert) or you can call a periodontist directly,” says Dr. Ross. “You should see a dentist sooner if you notice oral pain, swelling, loose teeth or increased bleeding gums.”

How to floss correctly and avoid irritating gums

If you’re new to flossing, expect some bleeding for the first few weeks, says Dr. Ross. This should resolve the longer you continue flossing.

So, how do you floss correctly? Here’s some advice from Dr. Ross:

  1. Start off with about 24 inches of floss. Wrap the piece of floss around both your middle fingers so you have about 2 inches left to floss with. Use your thumbs and index fingers to keep the floss tight.
  2. Place the floss between two teeth, and in a gentle up-and-down motion, move the floss along the curve of each tooth. Be careful not to go too far down into your gums.
  3. Move onto the next set of teeth, using a clean section of floss as you go.

It’s important to note that if you’ve been flossing for years and the bleeding is new, see your dentist or a periodontist to evaluate your gums.

“Incorrect flossing technique may cause bleeding gums, as well,” says Dr. Ross. “Regardless, studies show that daily flossing reduces gum inflammation and creates gum health.”

To learn more on this topic from Dr. Ross, listen to the Health Essentials Podcast episode, “Keeping Your Mouth Healthy.” New episodes of the Health Essentials Podcast publish every Wednesday.

Related Articles

Notes taped to window of possible new year's resolutions with hand in foreground holding marker.
December 1, 2023
How To Keep Your New Year’s Resolutions

Pick specific, measurable goals, but also be open to changing them if need be

bowl of soy-based cubes with hand
November 30, 2023
Can Soy Cause Breast Cancer?

Research consistently shows that soy-based foods do not increase cancer risk

person scratching neck that has eczema
November 29, 2023
How Lifestyle Changes and Self-Care Can Improve Your Atopic Dermatitis

Changing your wardrobe or environment won’t eliminate eczema, but it can help reduce flares

person stressing, with clock and books
November 29, 2023
6 Ways To Feel Less Anxious in the Mornings

Breathwork, sleep mediatation and avoiding screens can help fight back morning anxiety

covid toe
November 28, 2023
Are COVID Toes and Rashes Common Symptoms of the Coronavirus?

Chilblain-like skin lesions and rashes probably aren’t COVID related

magnesium pills out of container spelling out MG
November 28, 2023
Magnesium for Anxiety: Does It Help?

This supplement may help with regulating cortisol levels, which may help with stress

woman in her forties, using an inhaler
November 28, 2023
Why Sex Hormones Can Help (or Hurt) Your Asthma

Developmental changes like puberty and menopause can impact symptom severity

Top view of person sitting in bathtub with cold water and lots of ice.
November 27, 2023
Brrr! What To Know About Cold Plunges

An ice bath can ease sore muscles and decrease inflammation after a workout

Trending Topics

group of hands holding different beverages
November 14, 2023
10 Myths About Drinking Alcohol You Should Stop Repeating

Coffee won’t cure a hangover and you definitely shouldn’t mix your cocktail with an energy drink

Person applies moisturizer as part of their skin care routine after a shower.
November 10, 2023
Korean Skin Care Routines: What You Need To Know

Focus on the philosophy — replenishing and respecting your skin — not necessarily the steps

glass of cherry juice with cherries on table
November 8, 2023
Sleepy Girl Mocktail: What’s in It and Does It Really Make You Sleep Better?

This social media sleep hack with tart cherry juice and magnesium could be worth a try

Ad