The mouth ulcer has healed, but there is a white scar. Why is that?

White scars appearing after the healing of oral ulcers are usually formed during the repair and regeneration process of the oral mucosa. This condition may be caused by various factors, such as hypertrophic scarring, traumatic ulcers, leukoplakia, or oral lichen planus. These white scars generally do not cause pain, although they may occasionally result from fibrosis of the oral mucosa, infection, or other irritative factors. In most cases, white scars left after oral ulcers gradually fade over time. However, certain measures can be taken to promote recovery, such as maintaining good oral hygiene, following a balanced diet, and avoiding irritative foods. When necessary, medical advice should be sought, and treatment options such as medication, laser therapy, or surgical intervention can be considered based on the specific situation.