Herpes Labialis |
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| Blister, Fever; Blisters, Fever; Cold Sores; Fever Blisters; Labial Herpes Simplex; Sore, Cold; Sores, Cold | |
| Herpes simplex, caused by type 1 virus, primarily spread by oral secretions and usually occurring as a concomitant of fever. It may also develop in the absence of fever or prior illness. It commonly involves the facial region, especially the lips and the nares. (Dorland, 27th ed.) | |