En Español (Spanish Version) Risk Factors for Cold Sores (Herpes
Simplex Type 1) A risk factor is something that increases your
likelihood of getting a disease or condition. It is possible to
develop cold sores with or without the risk factors listed
below. However, the more risk factors you have, the greater your
likelihood of developing cold sores. The viruses that cause cold
sores are easily spread. They come out of the skin and are
“shed” from the site of the cold sore for 1-2 days before the
sore appears. Then the virus is in the fluid of the cold sore
blisters. Once you have a herpes simplex infection, cold sores
often form because of stress or illness. Some may form without
an identifiable trigger. Risk Factors for Becoming Infected With
Herpes Simplex 1 Virus Exposure to Someone With Cold Sores
Herpes simplex virus type 1 (HSV-1) can be spread by close
contact with someone who has a cold sore. It can also be spread
through personal items that are contaminated with the virus such
as razors, towels, or