Ask Dr. Jen Tan

Cold sore virus

Cold sores are caused by a virus known as Herpes Simplex Virus-1


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  • James's photo avatar
    James — 13.07.2018 21:14
    My question is not that gums in the middle of my teeth but like my lip in the mouth inside the mouth the middle like if I move my lip up it's red inside at the top and it red and burning sensation sometimes can that be caused by herpes simplex 1 HSV-1 it's always red but just to help you clarify what I'm talking about like if I put my two fingers and open my top lip and you see the inside of my lip that middle part


  • Kirsty's photo avatar
    Kirsty — 26.02.2018 09:50
    Why is a cold sore so itchy?


    • Jen Tan's photo avatar
      Jen Tan — 26.02.2018 13:01
      Hello Kirsty. The inflammatory process resulting from cold sores releases chemicals and amongst these are histamines which contribute to the main cause of itching.


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