Smoking is a major risk factor to your oral health. Not only do the chemicals in tobacco have a harmful effect on your oral tissues, but can deplete vitamin C and other nutrients and reduce your resistance to periodontal disease.
A poor diet is also a contributing factor, especially a diet high in sugars and other sticky or gummy carbohydrates and low in the minerals and vitamins needed for healthy gums, teeth and bones.
Hormonal changes during pregnancy increase the blood supply to certain tissues in the body including the gums. As a result, pregnant women may experience red, tender or bleeding gums.
Stress can also be a contributing factor because it diminishes your body’s ability to fight infection. Diabetes, AIDS and other health conditions can lower resistance to gum disease.
Poorly aligned teeth or poorly fitted partial dentures or bridges.
Information as per the ODA https://www.oda.ca/oral-health-basics/oral-conditions-diseases/gum-disease/
Braganza Periodontics - Peterborough Periodontist