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Cold sore is a major symptom of herpes infection which is caused by the virus named herpes simplex virus. There are two types of virus that causes herpes infection to be specific those viruses are herpes simplex virus 1 and herpes simplex virus 2. Both types of virus are highly contagious and may easily transmit through normal exposure to the virus. Once the virus enters I someone’s body they may become dormant and occasionally becomes active. The activeness of these viruses causes cold sore. Causes of the cold sores occurrence may depend on the herpes virus but it is up-to your immune system to fight with cold sore.
There are numerous factors involved in the occurrence of cold sore or that may lead to the causes of cold sore. This virus generally transmits through sexual intercourse, performing oral form sex, kissing, touching cold sores blister, using contaminated stuffs such as utensils, towels, lipstick. You can also count child birth infection of the causes of cold sore in infants. Cold sores generally occur around the area of mouth especially on the lips.