Definition of cold sore in US English:

cold sore


  • An inflamed blister in or near the mouth, caused by infection with the herpes simplex virus.

    • ‘Whereas cold sores are contagious, canker sores are not contagious - so kissing cannot spread them.’
    • ‘They think that it might be possible to use a version of the cold sore virus herpes simplex to treat a particularly nasty form of brain cancer called glioma.’
    • ‘Scientists have been given the go-ahead for one of the biggest ever gene therapy trials to investigate whether a modified form of the cold sore virus could save people with brain tumours.’
    • ‘Most of us have had cold sores caused by the herpes simplex virus.’
    • ‘If it had been herpes simplex (the cold sore virus), the blisters would have been uniform in size.’
    • ‘It is a type of herpes virus, which means it is related to the viruses that cause cold sores and genital herpes.’
    • ‘While there's still no cure for the herpes virus (herpes simplex 1 causes cold sores), cold sores are treatable.’
    • ‘Herpes sores usually look like blisters or cold sores.’
    • ‘Herpes simplex infections commonly cause either cold sores around the mouth or blisters in the genital area (also known as genital herpes).’
    • ‘Dab the oil neat on to infected cuts, fungal infections such as athlete's foot, or cold sores, warts, verrucas and insect bites.’
    • ‘Occasionally, a baby can also acquire herpes after birth if someone with a cold sore (oral herpes) kisses the baby.’
    • ‘Don't pick cold sores because this may spread the virus to other parts of the body, or allow the sore to become infected.’
    • ‘One possible explanation is that herpes simplex - the virus responsible for cold sores - may lie dormant in the facial nerve, then cause inflammation when it reactivates.’
    • ‘It might be a cold sore, as blistering lesions around your mouth are sometimes caused by a herpes virus - HSV1 often being the culprit.’
    • ‘Unlike other herpes viruses such as cold sores or shingles, EBV does not usually reactivate to cause a similar illness to the original infection.’
    • ‘Helen believes in keeping the virus in perspective, ‘If you get a cold sore on your mouth you don't assume you can never kiss anyone again.’
    • ‘This is why you should always wash your hands after touching a cold sore, because the virus is very infectious.’
    • ‘Encephalitis is inflammation of the brain, usually caused by a viral infection like measles, mumps, chicken pox, influenza or herpes simplex, the cold sore virus.’
    • ‘If they have any cold or flu symptoms, cold sores, open sores, or recent exposures, they should not visit.’
    • ‘Mouth ulcers are different from cold sores that appear on the outer lips and are due to a viral infection.’


cold sore

/ˈkōl(d) ˌsô(ə)r//ˈkoʊl(d) ˌsɔ(ə)r/