Andrew Johnson 17th U.S. President About President Johnson: He was a self-educated man of humble origin who was Abraham Lincoln's vice president during his second term and became President upon the assassination of Lincoln in April of 1865. Born to a poor family in Raleigh, North Carolina, as a boy Johnson never attended school.
Fever blisters, also called cold sores, usually occur outside the mouth--on the lips, chin, cheeks or in the nostrils. When fever blisters do occur inside the mouth, it is usually on the gums or the roof of the mouth. Inside the mouth, fever blisters are smaller than canker sores, heal more quickly, and often begin as a blister. Both canker sores and fever blisters have plagued mankind for thousands of years.
Fever Blister Causes and Risk Factors. A fever blister develops as a result of the herpes simplex virus. HSV-1 is a rash of the skin and mucous membranes (in particular, the lips). Itâs characterized by irritation, reddening of the skin and blisters that can cause a burning pain. Itâs harmless, but often annoying, and it usually heals within 10 days.