The growth of a small meatball on the inner wall of a child’s mouth may be related to a recent spicy diet, mucous cysts or epidermal cysts, and other factors. 1. Diet too spicy: children who have recently eaten a spicy and stimulating diet and consumed a large amount of food may develop a small meatball on the inner wall of the mouth. 2. Cysts: Children who suffer from mouth-related cysts may also cause the above situation, such as mucous cysts or epidermoid cysts. Children with a small meatball on the inner wall of the mouth may have other reasons, it is recommended to go to the hospital in a timely manner to carry out relevant examinations, clear the cause of the disease and actively treat the symptoms, to avoid delaying the child’s condition.