Contagiousness

• Herpes from cold sores is contagious to other people. Try not to pick or rub the sore. Do not open the blisters. Wash your hands frequently. The cold sores are contagious until dry (approximately 5 days).
• Most cold sore sufferers note a tingling in the lip before the sore appears (prodromal phase). Patients are also contagious during this time period.
• Eyes - Avoid spreading the virus to someone's eye by kissing or touching; an eye infection can be serious (Herpes keratitis).
• Mouth - Since the blisters and mouth secretions are contagious, avoid kissing other people during this time. Avoid sharing drinking glasses, eating utensils, or razors.
• Sex - Avoid oral sex during this time. Herpes from sores on your mouth can spread to your partner's genital area.
• Contact with Immunocompromised People - Avoid contact with anyone who has eczema or a weakened immune system.