Smoking. Need another reason to quit smoking? Smoking is one of the most significant risk factors associated with the development of gum disease. Additionally, smoking can lower the chances for successful treatment.
Hormonal changes in girls/women. These changes can make gums more sensitive and make it easier for gingivitis to develop.
Diabetes. People with diabetes are at higher risk for developing infections, including gum disease.
Other illnesses and their treatments. Diseases such as AIDS and its treatments can also negatively affect the health of gums, as can treatments for cancer.
Medications. There are hundreds of prescription and over the counter medications that can reduce the flow of saliva, which has a protective effect on the mouth. Without enough saliva, the mouth is vulnerable to infections such as gum disease. And some medicines can cause abnormal overgrowth of the gum tissue; this can make it difficult to keep teeth and gums clean.
Genetic susceptibility. Some people are more prone to severe gum disease than others.