Gingivitis is caused by a bacteria and is considered contagious, according to SuperSmile. This dental condition is also caused by poor oral hygiene that allows the bacteria to grow in plaque that sits against the teeth and beneath the gums. Proper brushing and flossing can help reduce the risk of gingivitis.
Gingivitis can be present without any symptoms being present. This means that it could potentially be passed from one person to another through kissing, utensil sharing or communal drinking and eating. A person with gingivitis might have gums that are swollen, red and painful.
A family history of periodontal disease, pregnancy, smoking and a weakened immune system are all risk factors for gingivitis. Individuals with an increased risk of this dental disease should have regular cleanings and practice proper hygiene.