Vesicles around mouth
Small fluid-filled blisters around the mouth can result from herpes simplex, irritation, allergy, infection, or another skin or oral condition.
The short answer
A vesicle is a small blister containing clear, cloudy, or blood-stained fluid; several vesicles may break and form shallow erosions.
What is the direct answer?
What does this question mean?
The pattern, exact location, pain, crusting, fever, new products, and contact history help distinguish a cold sore from dermatitis, burns, or other lesions.
What can you do next?
Do not pop the blisters, use a separate towel, wash hands after touching the area, and photograph changes so a clinician can compare them.
When should you seek dental care?
Get prompt care for eye involvement, rapidly spreading lesions, facial swelling, fever with poor intake, or a weakened immune system.
What should you ask the dentist?
Ask whether the lesions are viral, allergic, traumatic, or bacterial and whether a swab or other examination is needed.
Frequently asked questions
Are all mouth blisters cold sores?
No. Location and appearance overlap, so recurrent lip-border blisters differ from many ulcers, burns, and contact reactions.
Should I cover them?
Avoid manipulating them and ask a clinician about a suitable covering for the affected skin; do not place household chemicals on oral tissue.