Skip to content
My WebMD Sign In, Sign Up
Includes Expert Content
small blood blister on back gums
avatar
Kaydee040809 posted:
My sister has a tiny blood blister in the back of her mouth behind her last molar tooth.She noticed it today when brushing so not 100% certain how long its been there but assuming just 24 hours.It is about the size of the tip of a ball piont pen maybe slightly bigger.It doesnt hurt her,but shes concerned of the cause and wondering wether or not its something that might need professional care.Any advice would be appriciated.
Reply
 
avatar
Zev Kaufman, DDS responded:
Dear Kaydee040809:

The general rule of thumb when it comes to the mouth and mouth lesions is "two weeks", especially when there are no other symptoms such as pain.

If the sore, blister, etc. is there for over two weeks it is time to go and see your dentist.

The chances are that the sore is just a blood blister caused by trauma such as biting into something hard.

Since you do not know when it started and you have noticed it for about a week, wait until the end of the upcoming week. If it is gone, it was probably caused by trauma. If it is still there, please go see your dentist for a correct diagnosis.

Best wishes,
Dr. Zev Kaufman


Featuring Experts

For almost two decades, Dr. Zev Kaufman, has been known in the dental community as "the dentist's dentist." Graduating with honors and a...More

Helpful Tips

Dentures and implantsExpert
Technically speaking, a denture is any prosthetic use to replace a partial, or a complete dentition. It can be fixed (permanent), such as a ... More
Was this Helpful?
23 of 32 found this helpful

Related News

There was an error with this newsfeed

Related Drug Reviews

  • Drug Name User Reviews

Report Problems With Your Medications to the FDA

FDAYou are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

For more information, visit Dr. Kaufman's website