Gingivitis The bacteria in dental plaque causes gingivitis, or inflamed gum tissue around the teeth. Normal, healthy gums are firmly attached to the teeth and underlying bone. They are pale pink in light-skinned people and brown, gray or mottled in people with darker complexions. With gingivitis, gums are inflamed, red and swollen; are tender and bleed easily. Although mild gingivitis causes little pain and may be overlooked, it can become sever if left untreated. Gingivitis can progress to periodontitis, which can lead to tooth loss. More About Gingivitis Back to Index