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Causes of Fever Blisters

What Causes Fever Blisters to Return?

Many factors appear to weaken the body's defenses and trigger an outbreak of herpes. This includes such things as:
  • Fever
  • Illness, such as the common cold or flu
  • Emotional stress
  • Injury to the mouth
  • Exposure to sunlight or UV light
  • Exposure to cold weather or wind
  • Hormonal changes, such as with pregnancy or menstruation
  • Fatigue.
One study indicates that susceptibility to herpes recurrences is inherited. Research is currently underway to discover exactly how the triggering factors interact with the immune system and the virus to prompt a recurrence of fever blisters.
A Dose of Reassurance for Parents of Picky Eaters

Fever Blister Information

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