If your gums bleed when flossing, you probably need to change your dental care routine slightly. Although this doesn't mean your mouth is necessarily unclean, it can mean you need to floss more regularly. It's fairly common for gums to bleed when you first start flossing between the teeth; as long as the bleeding stops quickly, this is not usually considered problematic. While it may feel counter-intuitive, you should continue to floss daily.
Several factors can cause gums to bleed, including plaque build-up along the gumline and between the teeth, and plaque forming on top of calculus (tartar), thus contributing to gum problems. Vitamin deficiencies can also contribute to bleeding gums. Plaque is a layer of sticky germs that constantly forms on the teeth. If you don't get rid of plaque by flossing daily, it turns into a hard layer of calculus. It's hard to remove calculus without visiting a dentist or dental hygienist to scale the teeth. As such, your first line of defence against bleeding gums should always be to visit your dentist, who can alert you if your bleeding gums are symptomatic of an underlying condition.
In addition to removing plaque, you may want to use a rinse to kill germs around the affected area of your gums bleed when flossing. This keeps the problem from spreading deeper into the gums and roots of your teeth. You can either use home remedies, such as a salt water rinse, or purchase an antimicrobial oral rinse. Just make sure you swish the rinse thoroughly to rinse germs from your gums.
Always consult your dentist if you have bleeding gums. Furthermore, you should take care to eat a balanced diet: this will help develop and maintain strong, cavity-resistant teeth. Brush your teeth at least twice a day. If you're unsure how to brush your teeth correctly, ask your dental hygienist for some tips; if you smoke, consider options to help you quit. According to the South African Dental Association, using tobacco increases your risk of developing periodontal disease.