Fever blister when sick
A fever blister is usually a recurrent herpes simplex lesion on or around the lip that can reactivate during illness or stress.
The short answer
A fever blister is usually a recurrent herpes simplex lesion on or around the lip, and illness or stress can coincide with its reactivation.
What is the direct answer?
What does this question mean?
Keep it clean, do not pick it, and wash hands after touching it.
What can you do next?
Avoid kissing and sharing lip products, utensils, or toothbrushes while active.
When should you seek dental care?
Seek care for an eye-area lesion, widespread blisters, dehydration, or a nonhealing sore.
What should you ask the dentist?
Ask whether the lesion fits a cold sore and whether early antiviral treatment is suitable.
Frequently asked questions
What is the main thing to know?
A fever blister is usually a recurrent herpes simplex lesion on or around the lip, and illness or stress can coincide with its reactivation.
When should I arrange an examination?
Seek care for an eye-area lesion, widespread blisters, dehydration, or a nonhealing sore.