5 Reasons Why Your Gums Are Bleeding

5 Reasons why gums bleed

Noticing that your gums are bleeding after you brush or floss can be quite alarming, not to mention disgusting. No matter how good your teeth look, bleeding gums can very quickly take your smile from beautiful to horrific. Bleeding gums can also indicate possible issues with your oral health, brushing and flossing habits, or even your overall health. In fact, there are various reasons why your gums can bleed, including: 

gingivitis diagram

Gum Disease

One of the most common causes of bleeding gums is a mild form of gum disease known as gingivitis. Gingivitis occurs when excess bacteria accumulate along the gum line and cause the gum tissue to become infected. This infection not only causes the gums to bleed, but it can also cause the gums to become swollen, tender, and red. Gingivitis can be easily diagnosed by your dentist and effectively treated by improving your oral hygiene routine. Additionally, there are some medical conditions that can increase your risk of gum disease, such as diabetes, so it is important to know if you are at an increased risk. 


Although certain medications can be beneficial for treating medical conditions, they can also affect your oral health. One example of this is that taking blood thinners for heart or blood vessel disease can make your gums bleed since your blood is thinner than normal and does not clot as easily. Possible blood thinners that can cause gum bleeding include: warfarin, aspirin, and heparin. While bleeding gums may just be an unfortunate side effect of the medication, there are cases where your dentist and/or primary care provider may elect to change your medication if the bleeding is severe. For this reason, be sure to mention your bleeding gums to both your dentist and primary care provider. 

Aggressive Brushing or Flossing

frayed toothbrush

Although you may think that scrubbing your teeth while brushing or vigorously flossing will allow you to remove more plaque, tartar, and stains from your teeth, this is not the case. Only plaque and surface stains can be removed by brushing and flossing, as tartar and deep stains can only be removed by your dentist. Since plaque is very soft, you only need to apply minimal pressure while brushing and flossing. Applying too much pressure while brushing or flossing is likely to make your gums bleed. Additionally, it can also damage your enamel and cause your gums to recede. If you notice that your gums stop bleeding after lightening up your brushing and flossing, then chances are aggressive brushing or flossing is what caused your gums to bleed. 

Oral Hygiene Changes

Your gums can also bleed in response to changes in your oral hygiene routine. For example, if you don’t always floss consistently, but then start to floss consistently, it is normal to experience bleeding gums for about the first week until your gums have adapted. Another example of gums bleeding from changes in your oral hygiene is when you switch to a toothbrush that is too firm. If you notice that your gums are bleeding, think about whether you have changed anything in your oral hygiene routine and give it about a week before calling your dentist. 


Pregnant women are at an increased risk for pregnancy gingivitis because of the hormonal changes associated with pregnancy. Unfortunately, these hormonal changes can cause the body to become inflamed more easily when confronted with the bacteria responsible for gingivitis. If you are pregnant and notice bleeding gums, it is important to visit your dentist to determine if you have pregnancy gingivitis. This is because gum disease can have a negative affect on pregnancy and delivery, especially if it is able to advance. 

Dr. Sam Sadati wearing black suite portrait

Dr. Sadati possesses extensive experience in all aspects of advanced restorative dentistry, with an emphasis in cosmetic and implant dentistry.  He has attained Accredited Fellow status in the American Academy of Cosmetic Dentistry (AACD), the most rigorous, demanding credentialing process in the world. He is the only AACD Accredited Fellow in South Florida.