Blood Blister in Mouth: Causes, Treatment, Symptoms
Last updated 06/25
This blog has been reviewed and approved by Dr Robert Lee, a dental professional of 35 years
Table of Contents
Key Takeaways
- A blood blister forms when damaged blood vessels underneath an injury fill up a blister sac with leaking blood.
- Blood blisters can form for several reasons, including oral trauma, allergic reactions, and as a symptom of some diseases.
- Most blood blisters in the mouth are harmless, but long-lasting and painful blisters should be checked by a doctor.
