Mouth ulcers are a more common cause of sublingual pain and can be triggered by a variety of factors, such as
Low immunity.
Genetic factors.
Systemic disease factors.
Environmental factors: excessive mental stress.
Microbiological and trace elements: excessive dieting and partial dieting, resulting in unbalanced intake of various nutrients.
Usually like to eat potato chips, fish bones, shelled seafood and other sharp foods, which scratch or wear the oral mucosa.
Accidentally biting the oral mucosa by oneself.
The braces worn repeatedly rub the oral mucosa.
Brushing teeth too roughly, scratching the oral mucosa, etc.