The most common reason: plaque
Your gums bleed when you brush because they are inflamed. In most cases, the cause is plaque, the sticky film of bacteria that collects along your gum line. This early gum disease is called gingivitis. Cleveland Clinic and Mayo Clinic both list bleeding when you brush or floss as a classic sign.
It can feel backwards. Many people think "I brushed too hard, so I will brush less." But healthy gums do not bleed from normal brushing. When gums are puffy and irritated, the lightest touch makes them bleed. Cleaning the area better, not avoiding it, is how you fix the problem.
The good news is that this early stage can be reversed. Most people see bleeding fade within a couple of weeks of a professional cleaning and steady home care.
Here is a way to picture it. Plaque on your gum line is like a splinter under your skin. Your body sends blood to fight it, and the area swells and turns red. If you pull the splinter out, the swelling goes down. When you clean plaque off the gum line, your gums do the same.
Other causes to know about
Plaque is the top cause, but it is not the only one. Bleeding gums can also come from: brushing too hard or using a hard-bristle brush; starting to floss after a long break (a few days of light bleeding can be normal); tartar buildup that only a hygienist can remove; gum disease that has moved deeper (periodontitis); hormone changes, such as during pregnancy; dry mouth, which lets plaque build up faster; smoking, which hides signs of gum trouble but raises the risk of gum disease; medicines that thin the blood, such as aspirin or warfarin; poorly fitting dentures, crowns or bridges that irritate the gums.
Less often, bleeding gums are a sign of a health problem in the body, such as diabetes, a vitamin deficiency or a blood disorder. If your gums bleed easily and you also bruise easily or bleed in other places, see a doctor.
What to do at home
Keep going even when it bleeds. Expect some bleeding for the first several days. If your gums are healing, it should get better each week. If it is the same or worse after about two weeks, book a visit.
Home care alone cannot remove hardened tartar. If you have not had a professional cleaning in a while, that is often the missing piece.
These steps help in most cases:
- Brush twice a day for two minutes with a soft brush and fluoride toothpaste
- Tilt the bristles toward the gum line and use gentle, short strokes
- Floss once a day, sliding the floss gently under the gum line. Do not snap it down onto the gum.
- Try small interdental brushes or a water flosser if floss is hard to use
- Rinse with water after meals if you cannot brush
- Cut back on sugary snacks and drinks
- Quit smoking or vaping if you can
Is it brushing too hard?
Sometimes, yes. Brushing too hard can wear away gum tissue and expose the root, which causes sensitivity. Signs include gums that look pulled back, notches at the gum line and sensitive teeth. If that sounds like you, switch to a soft brush, use light pressure and let the bristles do the work. An electric brush with a pressure sensor can help.
But for most people, the problem is not too much force. It is too little cleaning along the gum line, which lets plaque stay and inflame the gums.
A quick test: look at your toothbrush. If the bristles are bent and flattened after only a month or two, you are pressing too hard. Hold the brush like a pencil, not a fist. Let the bristles do the work at the gum line.
Floss can cause bleeding too, if it is snapped down. Slide it gently, hug the side of each tooth in a C shape and move it up and down. Never saw it back and forth against the gum.
When bleeding gums are a warning sign
Most bleeding is mild, but some signs mean the problem has gone deeper. Periodontitis can damage the bone that holds your teeth, and that damage is permanent. The sooner it is found, the more of your gum and bone you can protect.
If your gums bleed a lot, will not stop bleeding on their own or you have a mouth injury, get care right away. If you take blood thinners, tell your dentist before any treatment.
See a dentist soon if you notice any of these: bleeding that lasts longer than about two weeks even with good care; gums that are swollen, dark red or pulling away from the teeth; bad breath or a bad taste that will not go away; loose teeth or a change in how your bite fits together; pus around your teeth or gums; bleeding along with fever, severe pain or swelling in the face.
Pregnancy is one common time for gums to bleed more. Hormone changes make gums react more strongly to plaque. If you are expecting, keep your cleanings on schedule and tell your dentist. It is safe and important to care for your gums during pregnancy.
What a dentist will do
At your visit, the dentist or hygienist checks how deep the spaces are around each tooth, looks at your gum color and takes X-rays to see the bone. Then they clean away plaque and tartar, including below the gum line. They show you how to clean areas you miss and may suggest tools that suit your mouth.
If the exam shows deeper gum disease, they will explain the next step, which is often a deep cleaning called scaling and root planing. Your dentist will also ask about your health and medicines, because they can affect your gums.
Most people with simple gum inflammation need a thorough cleaning, better home care and a follow-up visit to check progress.
The first step may be as simple as a longer, more careful cleaning. Many patients are surprised at how much their gums improve in a week or two. Your dentist will want to see you again to check how your gums are healing. That second look tells you both whether the plan is working.
Care for your gums at KDA
At Kendall Dental Associates, a routine cleaning with one of our hygienists lasts an hour. That gives us time to clean carefully and to show you how to care for your gums at home. Dr. Berry, Dr. Calderon, Dr. Faget and Dr. Huber are here for exams and for anything the hygienists find. Patients often tell us they appreciate a gentle approach, and we aim to ease any fears or hesitation you may have.
Call us at 305-271-1421 to book. You will find us at 8833 SW 107th Ave in Miami, in the Kendall Mall. Our hours are Monday to Friday, 8:00 AM to 5:00 PM, and we offer emergency care 24/7. We accept most dental insurances and most Medicare supplemental plans, and financing is available.
Common questions
Is it normal for gums to bleed when I floss?
A little bleeding can happen in the first days of flossing after a long break. If it continues past about two weeks, you likely have gum inflammation and should see a dentist.
Should I stop brushing the bleeding area?
No. Brush gently, but keep cleaning the area. Skipping it lets more plaque build up and the bleeding gets worse.
Can bleeding gums be a sign of something serious?
Usually it is gum inflammation. But it can be gum disease that has moved deeper, or rarely a problem like diabetes or a blood disorder. A dentist or doctor can find out.
Do vitamin deficiencies cause bleeding gums?
They can, though they are not the most common cause. Severe vitamin C deficiency is one example. Talk to a doctor if you think your diet is lacking.
What is the fastest way to stop gums from bleeding?
Press a clean, damp gauze or cloth on the spot for a few minutes. To fix the cause, get a professional cleaning and clean along your gum line well every day.
This article is general information, not medical advice. Your dentist will confirm what is right for you at your exam. General information checked against: my.clevelandclinic.org, mayoclinic.org, mouthhealthy.org.