Cold sores, also known as fever blisters, are small, fluid-filled blisters that usually appear on or around the lips. Here’s a simple breakdown: ⸻ 🔍 What Causes Cold Sores? • Virus: Caused by the Herpes Simplex Virus (HSV-1) (sometimes HSV-2 if transmitted orally). • Contagious: Spread through direct contact (kissing, sharing utensils, etc.). • Once infected, the virus stays in your body and can become reactivated. ⚡ Triggers for Outbreaks • Stress • Illness (like a cold or fever) • Sun exposur