---
title: "Cold Sore: Symptoms, Causes, Treatment, When to Seek Care"
description: "Cold sore outbreaks are herpes virus blisters on or near your lips that flare with stress or illness. Get clear care steps, labs, and no-referral help."
canonical: "https://www.vitalsvault.com/conditions/cold-sore"
last-updated: 2026-08-22
---

# Cold Sore: Symptoms, Causes, Treatment, When to Seek Care

> Cold sore outbreaks are herpes virus blisters on or near your lips that flare with stress or illness. Get clear care steps, labs, and no-referral help.

---

Canonical HTML: https://www.vitalsvault.com/conditions/cold-sore
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