Gingivitis is an acute and chronic inflammation of the soft tissues around the teeth, and in severe cases, tooth loosening and disruption of the bite relationship can occur. Knowledge of its development can effectively prevent and mitigate the recurrence of gingivitis. The most common cause of gingivitis is poor oral hygiene, resulting in the formation of tartar and the accumulation of large amounts of bacteria and plaque around the teeth, which eventually leads to the destruction of the gums or gum tissue. In addition, other factors can also lead to an increased risk of gingivitis: 1. hormonal changes, increased risk of gum inflammation during puberty, menopause, menstruation and pregnancy; 2. diseases, cancer, diabetes and HIV, which are more likely to occur in people with poor resistance; 3. smoking, regular smokers are more likely to develop gingivitis than non-smokers; 4. age, the risk of gingivitis increases with the age of the person; 5. poor dietary habits, vitamin C, and the risk of gingivitis. 5, poor dietary habits, vitamin C deficiency is associated with gum disease; 6, family history, people whose parents have gingivitis also have a higher risk of gingivitis. Treatment of gingivitis mainly involves removing irritants such as tartar and plaque, and in severe cases, this can be combined with medication and regular review. It is also important to increase the medical knowledge related to gingivitis and maintain oral hygiene strictly as required, which can effectively prevent the occurrence of gingivitis.