The most common reason gums bleed is due to the teeth and gums not being cleaned thoroughly enough.
If bacteria-containing dental plaque is left sitting on the teeth beside the gums, the bacteria infect the gums themselves. Gums that have been infected usually have a very red colour all along the edge of the gum beside the teeth. The gums may also be swollen as well as being red. This gum infection is called gingivitis.
When the teeth have been kept clean, the gum can heal up, is no longer swollen, and is a healthy pink colour. Healthy gums like this will not bleed when brushed. If you are worried about bleeding gums or any other aspect of your dental health, please mention it to us at the time of treatment or when making your appointment.