However, the virus can remain dormant (inactive) in many people, meaning that cold sores may never appear. Most people are infected when they are young and the infection lasts for life. However, both viruses can cause either cold sores or genital herpes.Ībout 80 per cent of adults are infected with HSV-1. Herpes simplex virus type 2 causes most cases of genital herpes. Cold sores are usually caused by the herpes simplex virus type 1 (HSV-1). There are 2 types of herpes simplex virus. The virus can spread between people by direct physical contact, such as kissing, skin-to-skin contact and sharing drink containers, eating utensils, towels or toothbrushes with someone who already has a cold sore.Īs well as a blister-like spot, the following symptoms are also common:ĬHECK YOUR SYMPTOMS - Use the mouth problems Symptom Checker and find out if you need to seek medical help. They can be highly contagious, even when the blisters aren’t present. ![]() What are the symptoms of cold sores?Ĭold sores start with an itchy and tingling sensation usually on the mouth, lips or nose and may form small blisters that crust after 3 days.Ĭold sores usually clear up after 2 weeks without leaving any scars. ![]() ![]() There is no cure for cold sores, but there are ways to treat the symptoms and prevent new outbreaks.
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