Dental question about observed-topic:oral-ulcer

An oral ulcer is a sore in the lining of the mouth, often caused by minor injury or inflammation, that should be assessed if it does not heal.

Ulcers can affect the cheek, lip, tongue, palate, or gum. Common triggers include biting, a sharp tooth, an appliance, irritation, infection, medicines, or inflammatory illness, and appearance alone cannot identify every cause.

Use a soft toothbrush, choose cool soft foods, avoid tobacco and irritating spicy or acidic foods, and prevent rubbing from a sharp edge or appliance. Do not pick the sore or apply household chemicals.

See a dentist or doctor if an ulcer lasts beyond the usual healing period, keeps returning, is unusually large, is hard or bleeding, or comes with fever, weight loss, difficulty swallowing, or a neck lump.

Ask what appearance and location suggest, whether a sharp tooth or appliance is involved, and whether testing or referral is needed. Ask how to protect the area while it heals.