Several factors can cause receding gums. Poor oral hygiene, gum disease, genetics, hormonal changes, tobacco use, and grinding or clenching.
Not brushing and flossing can lead to a buildup of plaque and tartar, which can cause gum disease and eventually lead to gum recession.
Gum disease is a bacterial infection that affects the gums and can cause them to recede. Some people may be more prone to it because of their genetic makeup.