My girlfriend has canker sores. Can I catch them from her?
    Matthew

    No. Canker sores are not contagious . Unlike cold sores, you can't catch canker sores from another person.

    So how can you tell if a sore is a (non-contagious) canker sore or a contagious cold sore? Cold sores usually develop outside the mouth, around the lips, chin, or nostrils. Canker sores are different: they only develop on the inside of the mouth.

    Canker sores go away on their own after a while and usually don't need treatment. But if your girlfriend gets canker sores often, is in a lot of pain, or the sores don't improve within 2 weeks, she should see her doctor.

    *Names have been changed to protect user privacy.

Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor.
© 1995-2021 KidsHealth® All rights reserved. Images provided by iStock, Getty Images, Corbis, Veer, Science Photo Library, Science Source Images, Shutterstock, and Clipart.com