Pharmacy Corner
Cold Sores: What You Need to Know When should I see a doctor?


  • If the cold sore lasts longer than 14 days
  • You have other general symptoms of illness, such as:
    • Fever
    • Swollen glands
    • Tiredness and fatigue
  • You have a weakened immune system:
    • You’re taking medications that decrease the immune system (e.g. steroids, tacrolimus)
    • You have a disease that suppresses your immune system (e.g. HIV, recent transplant)
  • If the cold sore is extremely red, swollen or contains pus
  • If you are not sure it is a cold sore or think it is something else