Causes
Cold sores
Causes of Cold Sores in Children
Risk Factors and Complications
Diagnosis and Treatment in Children
Preventing Cold Sores in Children
When to Seek Medical Attention for Children
Primary Herpes Simplex Infection
Cold sores are caused by certain strains of the herpes simplex virus (HSV). HSV-1 usually causes cold sores, while HSV-2 often causes genital herpes. However, either type can spread to the face or genitals through close contact, such as kissing or oral sex. Shared eating utensils, razors, and towels can also spread HSV-1. Cold sores are most likely to spread when blisters are present and oozing, but the virus can be transmitted even when no blisters are visible.
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