Why do my gums bleed when I floss?

Seeing blood in the sink after flossing can be alarming. While it’s not always “serious,” it also isn't something to ignore. 

Healthy gums generally don’t bleed during normal brushing or flossing. In many cases, bleeding is an early sign of gum inflammation caused by plaque accumulating along the gumline. According to the Cleveland Clinic, occasional bleeding often indicates gingivitis, the earliest stage of gum disease, which can be reversed with consistent oral hygiene and professional care.

What Causes Bleeding Gums?

If you've recently started flossing after a long break, your gums may bleed for a few days as they adjust. However, persistent bleeding may point to plaque buildup irritating the gum tissue. Other possible causes include:

  • Gingivitis 
  • Flossing too aggressively
  • A toothbrush with hard bristles
  • Certain medications or underlying health conditions

The key isn't to stop flossing. In fact, flossing gently every day helps remove the plaque that's causing the inflammation in the first place. If bleeding continues for more than a week or two despite good oral hygiene, schedule a dental evaluation.

Professional cleanings remove hardened plaque that brushing and flossing can't eliminate at home, allowing your gums to heal and reducing your risk of more advanced periodontal disease.

Healthy Gums in Charlotte Start with Early Care

If your gums bleed when you floss, don't ignore the warning sign. Contact Dr. Heather Gentry and the caring Gentry Dental team today to schedule an exam and professional cleaning. We'll identify the cause, recommend the right treatment, and help restore your gums to health and comfort.