Image of a cold sore

Cold Sore Triggers

There are many things that can trigger cold sores in different people:

  • Stress weakens the immune system which can cause cold sores to develop.
  • Exposure to the sun’s ultraviolet rays can damage skin which can cause cold sores to develop.
  • Exposure to Cold/Chapped Lips can dry out lips which can cause cold sores.
  • Fever, Cold, or Flu weakens the immune system which can cause cold sores to develop.
  • Fatigue weakens the immune system which can cause cold sores to develop.
  • Trauma, caused by dentist or other injury, to mouth can cause cold sores to develop.
  • Hormonal changes, due to menstruation or pregnancy, weaken the body’s immune system which can cause cold sores to develop.