Herpes simplex viral infections can lead to blisters on the fingers. This is a condition called herpes whitlow, and it is one way in which a person with herpes can self-infect other parts of her own body.
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Herpes whitlow is the appearance of a herpes blister on the fingers or hands, according to Microbiology and Immunology Online. Before a blister occurs, a burning or itching sensation is felt in the area that will be affected; this is called prodrome.
Touching fluid from a blister, either caused by HSV-1 (cold sores) or HSV-2 (genital herpes) can lead to herpes whitlow.
Health care workers appear to be at increased risk of developing herpes whitlow through contact with patients' herpetic blisters.
Herpetic blisters clear up on their own without treatment, but can be treated with antiviral drugs like acyclovir, valacyclovir and famciclovir.
A person with herpes whitlow can infect other parts of his own body. According to the Mayo Clinic, one common occurrence is infection of the eye, which can lead to blindness.