Acute, life-threatening symptoms? Call 144 directly.
Condition
Cold sores: signs and assessment
- small clusters of blisters that break, crust and heal
- healing usually within seven to ten days

Orientation
How urgent is it?
When in doubt, always choose the higher level.
Assessment and treatment on site. You are welcome without an appointment, too.
Book an appointmentor simply walk in
- blisters near the eye or on the tip of the nose
- spread beyond the lip
- severe pain or fever
- a weakened immune system
- very frequent recurrences
If your symptoms are acute and life-threatening, call 144. aprioris is not an emergency department.
Overview
What you should know
Blisters on the lip, caused by herpes simplex virus.
Cold sores are caused by herpes simplex virus, which stays in the body after the first infection. In many people the blisters return, often with stress, sun or fever. The course is usually harmless and lasts about a week to ten days.
One address for your concern
Book an appointment or come by during opening hours. And if you are unsure whether we are the right address: come anyway; we will work it out with you.
Symptoms
Typical signs
Typical signs
- tingling, itching or burning on the lip, often hours before the blisters appear
- small clusters of blisters that break, crust and heal
- healing usually within seven to ten days
What happens
What happens at aprioris
Our aim: to resolve your concern directly on site. Assessment, treatment and, where needed, a prescription or certificate. If specialist care is needed, we refer you on.
We listen to your concern, examine you carefully and put the findings in context. Then we discuss what happens next with you.
Every case is reviewed and signed off by a physician, either during your visit or shortly after. Anything that needs specialist care, we refer on, prioritised by urgency and with a written report. aprioris does not dispense medication itself.
Treatment
Treatment overview
What you can do yourself
- do not scratch or squeeze the area
- wash your hands after touching it, to avoid passing it on
- avoid contact with newborns and people with a weakened immune system
- use lip protection against the sun if you are prone to it
Services
Related services
Locations
Where we treat this
Available at 10 locations, with an appointment or as a walk-in.
AmriswilBadenBern ChristoffelHerisauLucerne NeustadtWinterthur MarktgasseZurich AlbisriederplatzZurich LimmatplatzZurich MorgentalZurich Paradeplatz
Booking
Book an appointment online
FAQ
Frequently asked questions
Do I need an appointment for this?
Not necessarily. You are welcome without booking during opening hours. If you book an appointment, you are seen at the agreed time. You can book online or by calling the practice.
What does the assessment cost?
aprioris is a medical practice licensed by the canton. Services covered by mandatory health insurance are billed accordingly. Your deductible and co-payment apply, as in any medical practice. Preventive services are paid for privately; prices are shown with each service.
What should I bring?
Your health insurance card. If you take medication, a current medication list or the packaging helps. For anything to do with vaccination, please bring your vaccination record.
When should I go straight to emergency care?
Blisters near the eye or on the tip of the nose, changes in vision or severe eye pain: that belongs with an ophthalmologist immediately.
