Skip to content

    Announcements

    Exciting News for WebMD Members!

    We've been busy behind the scenes building new message boards for you. You'll have new and easier ways to find messages, connect with others, and share your stories.

    And, this will all be available on your smartphone or other mobile device!

    What Do You Need to Do?

    The message board you're used to will be closing in the coming weeks. While many of your boards will be making the move to our new home, your posts will not. Want to keep a discussion going? Save posts you want to continue (this includes your member profile story), so that you can re-post them in the new message boards.

    Keep an eye here and on your email inbox, we'll be back in touch soon to give you all the information you need!


    Yours in health,
    WebMD Message Boards Management

    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


    Helpful Tips

    Rash on lips
    I just noticed a bunch of tiny white bumps on my top lip. They are white, not clear, about the size of a pin point, and don't seem like ... More
    Was this Helpful?
    15 of 34 found this helpful

    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