What symptom is commonly associated with gingivitis due to biofilm accumulation?

Edema, which refers to the swelling caused by inflammation, is a common symptom associated with gingivitis due to biofilm accumulation. When biofilm, primarily composed of bacteria, accumulates on the teeth, it irritates the surrounding gum tissue. This irritation triggers an inflammatory response, leading to increased blood flow to the area and subsequent swelling of the gums. The presence of edema can make the gums appear red, swollen, and sensitive, which are hallmark signs of gingivitis.

While halitosis, tooth mobility, and sensitivity to teeth can be related to periodontal conditions, they are generally more associated with more advanced periodontal diseases or other dental issues. In the case of gingivitis specifically, the hallmark sign is the edema related to inflammation caused by biofilm accumulation.