Cold sore blister burst
After a cold-sore blister breaks, keep it clean, avoid picking and contact spread, and seek care for eye involvement or delayed healing.
The short answer
A burst cold sore is an open, contagious herpes simplex lesion, so gentle cleansing and avoiding contact help the area heal.
What is the direct answer?
What does this question mean?
Cold sores usually affect the lip border and progress from tingling to vesicles, crusting, and healing. Fluid can transfer virus to the eye or broken skin.
What can you do next?
Wash hands, rinse gently with water, pat dry, and do not peel the crust. Avoid kissing, oral contact, and sharing cups, towels, or lip products while active.
When should you seek dental care?
Seek prompt care if the sore is near an eye, spreads, becomes pus-filled, or occurs with fever or reduced immunity.
What should you ask the dentist?
Ask whether it resembles herpes simplex, whether antiviral treatment is appropriate, and how to protect vulnerable household members.
Frequently asked questions
What is the main point?
A burst cold sore is an open, contagious herpes simplex lesion, so gentle cleansing and avoiding contact help the area heal.
What should I do now?
Wash hands, rinse gently with water, pat dry, and do not peel the crust. Avoid kissing, oral contact, and sharing cups, towels, or lip products while active.