Cold Sores: Understanding Recurrence and Management

Cold sores are caused by herpes simplex virus type 1 (HSV-1). After primary infection, the virus remains latent in trigeminal ganglia and can reactivate lifelong.

Key Facts

• No cure for HSV-1; virus persists indefinitely.
• Recurrences are common; frequency varies by individual.
• Triggers: Stress, fatigue, UV exposure, illness, hormonal changes, trauma.

Management Strategies

• Antiviral therapy: Oral (valacyclovir, acyclovir) at prodrome shortens episodes; daily suppressive therapy reduces frequency.
• Topical antivirals: Less effective than oral.
• Sun protection: Lip balm with SPF 30+.
• Lifestyle: Stress reduction, adequate sleep, avoid triggers.

While you cannot eliminate the virus, these measures significantly reduce outbreak burden.