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Cold sores are caused by type 1 herpes simplex virus. It is also known as fever blisters. This disease is not only annoying they are even painful. It is better to prevent the virus that causes the disease before it gets affected. This disease can be spread through skin contact.
Using personal items like toothbrushes, towels, or drinking glasses of a HSV 1 patient can also spread the disease. Once you are infected by HSV 1 (herpes simplex virus), they will hide in the nerve cell and reside permanently in the body. You have to avoid triggers like direct exposure to sunlight, fever or cold, emotional stress as the cold sore out break.
This disease usually appears to a person when he is terribly stressed out. This is the time a person will be more vulnerable as the immune system will be fighting of bugs. When cold sores affect you, you should try keeping the symptoms as minimal by catching the disease when you feel it starts to come on