There are several possible reasons why this might be happening after dental work. During dental procedures, instruments like suction devices, drills, or mirrors can accidentally irritate or injure the tongue. Even minor trauma can lead to sores, especially if the tongue is pressed against sharp edges or if the procedure is lengthy. Some dental materials, such as bonding agents, etchants, or even topical anesthetics, can irritate the soft tissues of the mouth, including the tongue. If these materials come into contact with the tongue, they might cause a sore or ulcer. Although rare, some people may have an allergic reaction to dental materials (e.g., metals in fillings, latex gloves, or certain adhesives). This could manifest as sores or irritation in the mouth. Dental visits can be stressful, and stress is known to trigger canker sores (aphthous ulcers) in some people. If you’re feeling anxious during appointments, this could contribute to the development of sores.
