If your gums bleed when you brush, the most common reason is gingivitis: your gums are inflamed by plaque building up along the gumline. Gingivitis is reversible with a professional cleaning and good home care. Do not stop brushing. Brush gently with a soft-bristled toothbrush and schedule a checkup.
Seeing pink in the sink is scary, and it is tempting to leave that area alone. It is actually the opposite.
MedlinePlus puts it in one sentence: the main cause of bleeding gums is the buildup of plaque at the gumline. Plaque is a sticky film of bacteria that forms on teeth that are not cleaned well (NIDCR).
When plaque stays there, the gums become inflamed: red, swollen and quick to bleed. That is gingivitis, the mildest form of gum disease, according to the American Academy of Periodontology (perio.org).
Over time, plaque that is not removed hardens into tartar, which you cannot remove with a toothbrush at home (NIDCR).
Keep in mind: gum disease is often silent, and symptoms may not show up until it is advanced (perio.org). Bleeding is often the first clue your mouth gives you.
If you stop cleaning the area that bleeds, more plaque builds up and the inflammation continues. The key is to clean well without scrubbing. Here is what the ADA recommends on MouthHealthy:
One caveat: brushing too hard and flossing the wrong way also appear on MedlinePlus's list of causes of bleeding gums. If you are unsure about the order (floss before or after? what about mouthwash?), we explain it in floss, brush, rinse: the right order.
It is not rare. According to the CDC, 42% of U.S. adults aged 30 and older have periodontitis, and about 8% have severe periodontitis.
Signs it may be more than gingivitis, according to perio.org: gums that recede and make teeth look longer, loose or separating teeth, pus between gums and teeth, persistent bad breath, or a change in the way your teeth fit together when you bite.
You may have read that gum disease causes heart problems. The American Heart Association (AHA) reviewed the evidence in a scientific statement published in December 2025: periodontal disease and cardiovascular disease are associated, but causality has not been established. Part of the link is explained by shared risk factors such as age, smoking and obesity (AHA). More research is needed to know whether treating gum disease reduces heart problems.
MedlinePlus also lists:
The NIDCR explains that people with diabetes have a higher chance of gum disease, and that gum disease may make blood sugar harder to control. If you have diabetes and notice swollen or bleeding gums, see your dentist.
According to the NIDCR, tobacco use is the most significant risk factor for gum disease, and quitting can improve treatment results.
Schedule a checkup if any of these apply:
When not to wait: if your jaw or face is swollen, or you have a fever, call your dentist the same day; MedlinePlus describes jaw swelling as a very serious symptom. If you have trouble breathing or swallowing, call 911 or go to the emergency room. More in dental emergency in Kendall: what to do.
At the visit, the dentist examines your gums and teeth, asks about your medications and overall health, and may take X-rays. Then they decide what you need:
The CDC recommends a dental checkup at least once a year so gum disease can be caught early. Always ask why each treatment is being recommended.
PureSmile Miami opens on November 2, 2026, at 8000 SW 117th Ave, Suite 100, in Kendall. At your first visit, our dentist examines your gums and walks you through your X-rays to explain whether a regular cleaning is enough or you need something more, and why. We see patients in English or Spanish, verify your insurance for free and give you a written treatment plan before we start.
Join the waitlist or call us at (305) 787-3642.
Keep brushing gently twice a day with a soft brush, and clean between your teeth daily. If the bleeding keeps happening, schedule a checkup: the most common cause is gingivitis, which is treated with a professional cleaning.
The most common is gingivitis, which can progress to periodontitis. MedlinePlus lists other causes: blood thinners, pregnancy, vitamin C or K deficiency, bleeding disorders and leukemia.
A lack of vitamin C (scurvy) or vitamin K can cause bleeding gums. But plaque, not a vitamin, is almost always the cause. Take supplements only if your doctor confirms a deficiency.
What works is removing the plaque that causes it: gentle brushing twice a day, cleaning between your teeth daily and professional cleanings. No home remedy replaces that or a dental checkup.
The two are associated, but according to the AHA, it has not been shown that one causes the other. Take care of your gums to keep your teeth.
Hormonal changes during pregnancy can make gums bleed (MedlinePlus). Do not ignore it: keep up your daily routine and let your dentist and your doctor know.
General information; not a substitute for an in-person evaluation. Responsible dentist: Dr. Yoan Suárez Zayas, DMD (FL License DN 21413). Sources: MedlinePlus; American Academy of Periodontology (perio.org); NIDCR; MouthHealthy (ADA); CDC; American Heart Association (Circulation, 2025).
