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Cold sores are caused by a contagious virus called herpes simplex. There are two types of herpes simplex virus. Type 1 usually causes oral herpes, or cold sores. Type 1 herpes virus infects more than half of the U.S. population by the time they reach their 20s. Type 2 usually affects the genital area

Some people have no symptoms from the infection. But others develop painful and unsightly cold sores that last for a week or more. Cold sores usually occur outside the mouth -- on the lips, chin, and cheeks, or in the nostrils. When they do occur inside the mouth, it is usually on the gums or the roof of the mouth.

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a photograph of lips with a cold sore
Results 1 - 10 of 780 for cold sores
  1. Cold Sores (National Library of Medicine)  
    Cold sores are caused by a contagious virus called herpes simplex. There are two types of herpes simplex virus. Type 1 usually causes oral herpes, or cold sores. Type 1 herpes virus infects more than half ...
  2. Cold Sores (Herpes) Interactive Tutorial (Patient Education Institute)  
    Cold Sores Introduction Cold sores are blisters on and around the lips. They are annoying and sometimes painful. Sometimes they are called fever blisters. ...
  3. Coping with Cold Sores (Nemours Foundation)  
    ... Main Page The Pink Locker Society Coping With Cold Sores KidsHealth > Kids > Illnesses & Injuries > Aches, Pains & Injuries > Coping ... sore." What's that? Adam wondered. What Is a Cold Sore? Cold sores are small blisters that is reddish ...
  4. Cold Sores (HSV-1) (Nemours Foundation)  
    ... cold sores and what causes them? What's a Cold Sore? Cold sores, which are small and somewhat painful ... sores in either place. Continue What Causes a Cold Sore? HSV-1 is very common. If you have ...
  5. Cold Sores (Academy of General Dentistry)  
    ... delivered directly to your desktop! more... What Are Cold Sores? Article Chapters What Are Cold Sores? Cold Sore ... January 2012 Previous Next Related Articles: Canker and Cold Sores Aloe Vera May Help Relieve Mouth Sores Canker ...
  6. Herpes Simplex Virus (Cold Sores) (American Academy of Pediatrics)  
    ... Cold Sores) Health Issues Listen Herpes Simplex Virus (Cold Sores) Article Body Herpes simplex viruses (HSVs) cause raised ... or inside the mouth, they are commonly called cold sores or fever blisters. In most cases, these facial ...
  7. Cold Sores (Orofacial Herpes) (Logical Images)  
    newsletter | contact Share | Cold Sores (Orofacial Herpes) Information for adults A A A Grouped, crusted blisters on the lips and chin are typical of ... face, known as orofacial herpes simplex, herpes labialis, cold sores, or fever blisters, is a common, recurrent skin ...
  8. ... Injuries Can You Get Genital Herpes From a Cold Sore? KidsHealth > Teens > Q&A > Birth Control, Pregnancy & STDs > Can You Get Genital Herpes From a Cold Sore? Print A A A Text Size Can you ...
  9. ... sharing features on this page, please enable JavaScript. Cold Sore Virus Active Without Symptoms, Study Finds Research reveals ... Dallas Thursday, July 31, 2014 Related MedlinePlus Pages Cold Sores Herpes Simplex THURSDAY, July 31, 2014 (HealthDay News) -- ...
  10. Herpes Simplex (Cold Sores and Genital Herpes) (New Mexico AIDS Education and Training Center)  
    ... Select a Language: Fact Sheet 508 Herpes Simplex (Cold Sores and Genital Herpes) WHAT IS HERPES? HSV AND ... virus 1 (HSV1) is the common cause of cold sores (oral herpes) around the mouth. HSV2 normally causes ...
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