What Causes Fever Blisters?

Q:
What causes fever blisters?

A:
The herpes simplex virus (HSV-1) causes fever blisters, also known as cold sores, and oral herpes. They can spread or infect other parts of the body, including the genitals. Symptoms don’t always appear right away. The virus can also lie dormant in your system and can recur at any given time. Generally, an outbreak occurs when you’re not completely healthy.

Triggers
Certain triggers may activate the virus and cause an outbreak. These include:

  • dental procedures
  • depression
  • extensive sun exposure
  • fatigue
  • hormone fluctuations
  • injury or trauma to the afflicted area
  • stress

Your doctor can help you identify outbreak triggers or the root cause of the outbreaks. They will also determine if the outbreaks increase your risk for other complications.

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* The Content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.