Contagious Cold Sores: Everything You Need to Know

Last updated 06/25
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This blog has been reviewed and approved by Dr Robert Lee, a dental professional of 35 years

Table of Contents
Key Takeaways
  1. Cold sores are caused by the Herpes Simplex Virus (HSV-1), which is highly contagious. Once you have HSV-1, you have it for life.
  2. Cold sores themselves are highly contagious and will take weeks to heal. It’s imperative to have strict oral and body hygiene when you have a cold sore and especially avoid touching it, to prevent it from spreading.
  3. Although they may look similar, mouth ulcers, canker sores and cold sores are all different types of sores you can get in and around your mouth. Ensure you know what you must know how best to treat and if possible, prevent in future.
  4. Cold sore treatments will depend on how long you have them for and how painful they are. They typically scab and heal within a few weeks, however if they persist, go to a doctor or dentist for medical treatment.