No bone structure is lost around the teeth at this stage of gum disease. Blood on the toothbrush or dental floss is one of the earliest and most common signs of gingivitis. Your gums should never bleed while brushing or flossing. On the other hand, if oral hygiene habits are poor, gingivitis may progress to periodontitis. Notice the gums are red and swollen.
Periodontal disease is destruction of bone and the structures supporting the teeth.
Unfortunately periodontitis is irreversible, but you can stop its progression through good oral hygiene and visiting your dental professional. Periodontitis occurs when the inflammation of the gums progresses into the deeper underlying structures and bone. The gums may feel irritated, appear bright red, and bleed easily. The ligaments holding the tooth in its socket break down and the gums pull away from the teeth, resulting in a periodontal pocket or space between the tooth and gum. The periodontal pocket deepens and fills with more bacteria.