The first signs of inflamed gums are redness and slight swelling at the gum line and possibly bleeding when brushing the teeth.
The inflammation caused at the gum line by the dental plaque can make the gums appear red to dark red, as the inflammation widens the blood vessels in the connective tissue. The gum can be swollen and bleed at the slightest contact, for example when brushing the teeth or using dental floss.
However, if the teeth are cleaned again regularly using good oral hygiene at home, these signs of inflammation or the former gingivitis go away again within a few days.
If gum bleeding continues to occur despite good oral hygiene, the gums should be examined in a dental practice for further investigation.