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Home -> Shop By Store -> Cold SoreCold SoreWhat is Cold Sore?Cold sores and fever blisters are caused by localized viral infections, which typically cause clusters of blisters on the lip and, rarely, inside the mouth. How its is caused ? They are caused by the herpes simplex virus type 1 (HSV-1), a virus that passes from person to person by direct contact with infected skin or saliva. Once HSV-1 invades the skin, it causes a primary infection, which usually occurs in childhood, causing a fever, sore mouth and sore throat. After this primary infection subsides, the virus remains dormant indefinitely in nerve roots near the affected skin area. In some patients, the virus intermittently reactivates to cause herpes recurrences (secondary herpes episodes), which produce cold sores and fever blisters. What are the symtoms ? In many patients, it causes fever, painful swelling and open sores on the gums and inside the cheeks, a painful pharyngitis (throat infection) that is mistaken for "strep throat," or another form of bacterial pharyngitis. How it can be diagnosed? Physician usually can diagnose cold sores and fever blisters by simply examining the affected area of skin. More sophisticated methods of diagnosis include virus cultures, immunofluorescence (IF) or immunoperoxidase (IP) studies to detect HSV-1 in cells scraped from the infected area. |
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