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A cold sore is a very small blister that is filled with fluid and is caused by a viral infection, according to Mayo Clinic. It is also known as a fever blister. Cold sores are known to appear in groups, and it is common ... More »

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According to Mayo Clinic, cold sores are small blisters that develop on the lips, nose and cheeks. If more than one cold sore is present, the sores may merge with one another and erupt, causing ulcerations that leak flui... More »

www.reference.com Health Conditions & Diseases STIs

According to How Stuff Works, it is important never to pop a cold sore, as this causes the fluid inside to be expelled, spreading the germs causing the cold sore. Allowing a cold sore to heal on its own or with the assis... More »

www.reference.com Health Conditions & Diseases Skin Conditions
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According to How Stuff Works, it is important never to pop a cold sore, as this causes the fluid inside to be expelled, spreading the germs causing the cold sore. Allowing a cold sore to heal on its own or with the assis... More »

www.reference.com Health Conditions & Diseases Skin Conditions

Shingles is a viral infection that affects a small portion of the body, resulting in pain, burning and numbness, followed by the appearance of a red rash after a few days, according to Mayo Clinic. The rash eventually fo... More »

www.reference.com Health Conditions & Diseases Skin Conditions

Shingles is defined as a viral infection that causes a painful rash, according to Mayo Clinic. The shingles virus is caused by the same one that causes chickenpox. Shingles isn't a life-threatening disease, but the rash ... More »

www.reference.com Health Conditions & Diseases Skin Conditions

The poison oak rash and fluid in the associated blisters are not contagious, according to Mayo Clinic. Touching the rash or blisters of an infected person does not transmit the condition. More »

www.reference.com Health Conditions & Diseases Skin Conditions