Cold sores are caused by a herpes virus. Herpes viruses (chickenpox is another kind) stay in the body after the first infection. Later, something that triggers the virus causes it to become active again. Cold sores may appear after colds, fevers, exposure to the sun, stressful times, or during menstruation. Sometimes, they appear for no apparent reason.
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Information about cold sores, fever blisters, oral herpes, and their remedies.
Listing of clinical research trials.
Consumer health resource center providing information on causes, symptoms, and treatment.
Information and advice from the UK charity formed by patients themselves.
Find information about herpes and cold sores including signs and symptoms, diagnosis, treatment, and how it is spread and prevention. Includes further resources and a message board.
Information on cold sores and fever blisters including symptoms, transmittal, recurrence, diagnosis and treatment.
Factsheet on this common infection caused by the Herpes simplex virus, causes, symptoms, treatment and possible complications.
Factsheet with details of causes, symptoms, self-care and treatment.
Encyclopedia article on this infection of the lip and face by the Herpes simplex virus.
Information and advice from the UK charity formed by patients themselves.
Factsheet with details of causes, symptoms, self-care and treatment.
Consumer health resource center providing information on causes, symptoms, and treatment.
Information on cold sores and fever blisters including symptoms, transmittal, recurrence, diagnosis and treatment.
Find information about herpes and cold sores including signs and symptoms, diagnosis, treatment, and how it is spread and prevention. Includes further resources and a message board.
Encyclopedia article on this infection of the lip and face by the Herpes simplex virus.
Factsheet on this common infection caused by the Herpes simplex virus, causes, symptoms, treatment and possible complications.
Listing of clinical research trials.
Information about cold sores, fever blisters, oral herpes, and their remedies.
