Painful sore inside lip
A sore inside the lip is often a minor ulcer, but persistence, appearance, and symptoms guide assessment.
The short answer
A painful sore inside the lip is often a shallow ulcer from biting, friction, or a sharp tooth, but its appearance and duration determine whether it needs assessment.
What is the direct answer?
What does this question mean?
The inner lip is delicate oral mucosa. Minor trauma, aphthous ulcers, viral lesions, reactions, and other conditions can produce similar pain.
What can you do next?
Avoid rubbing the area, eat soft foods, brush gently, and use plain water or a mild salt-water rinse.
When should you seek dental care?
Arrange examination for a persistent, recurrent, large, hard, numb, or bleeding sore, or one with a neck lump, fever, or difficulty eating.
What should you ask the dentist?
Ask whether a tooth or appliance is causing trauma and mention tobacco, alcohol, medicines, products, and prior episodes.
Frequently asked questions
Can I put aspirin on it?
No, direct aspirin can chemically injure the mucosa.
What is the main next step?
Avoid rubbing the area, eat soft foods, brush gently, and use plain water or a mild salt-water rinse.