Mouth sores are painful lesions that can develop on the lips, gums, tongue, cheeks, or other soft tissues inside the mouth. They may result from irritation, infection, injury, or certain underlying health conditions affecting oral tissues. This can make eating, drinking, and speaking uncomfortable if left untreated. Professional evaluation and appropriate treatment help relieve discomfort, promote healing, and restore lasting oral health.
Know the Signs
Common Symptoms
Mouth sores can appear suddenly or develop gradually, depending on the underlying cause. If you’re experiencing any of the following symptoms, it’s a good idea to schedule a dental evaluation.
- Painful Mouth Ulcers: Small sores inside the mouth may cause discomfort during everyday activities.
- Burning Sensation: Affected areas may sting or burn before sores become clearly visible.
- Difficulty Eating: Pain while chewing or swallowing can make meals uncomfortable and difficult.
- Red or White Patches: Discolored patches may appear on the gums, tongue, or inner cheeks.
- Swollen Tissues: Soft tissues around the sore may become tender, irritated, or inflamed.
- Persistent Mouth Pain: Ongoing discomfort may continue even after the sore first appears.


Why It Happens
Underlying Causes
Mouth sores can result from several conditions affecting the soft tissues inside the mouth. Identifying the underlying cause helps promote healing and prevent recurring discomfort.
- Minor Injury: Accidental bites or irritation can damage the delicate tissues inside the mouth.
- Viral Infection: Certain viral infections may trigger painful sores on oral tissues.
- Nutritional Deficiency: Low vitamin levels can affect healing and increase the risk of mouth sores.