The gums are attached to the neck of the teeth and the edge of the alveolar process, and are a compound squamous epithelial oral mucosa that is normally pink, lustrous, tough, and does not bleed easily when touched lightly or chewed, and only bleeds easily when the gums are inflamed. There are many causes of gingivitis, both local and systemic, including adolescent gingivitis, gingivitis during pregnancy, drug gingivitis, vitamin deficiency, blood system disorders, immune system disorders, etc. Local causes include poor oral hygiene, dental plaque adhesion, dental calculus, food-embedded gingivitis, etc. Vitamin C deficiency can cause gum bleeding, the specific change is a purple-red inflammatory hyperplasia of the gums, a prolonged lack of vitamin C can cause the capillaries to increase the brittleness of the gums are very easy to bleed, especially when brushing or chewing the bleeding is more obvious. It is recommended that you eat a balanced diet, eat more fresh vegetables and fruits, green foods are rich in vitamin C. Vitamin C plays a very important role in the healing of wounds and the restorative regeneration of bone and cartilage, while vitamin C, also called ‘ascorbic acid’, can enhance the body’s ability to fight infection and increase immunity.