Should You Go to the Dentist With a Cold Sore? What to Know

The Short Answer: Routine Visits Wait, Emergencies Do Not

Most people who ask us this have an appointment on Sunday and a tingle on their lip on Thursday night, and are hoping we will say it does not matter. Sometimes it does not. Mostly it depends on what the appointment is for.

• Wait until it has healed: check-ups, cleanings, whitening, cosmetic work and anything else that can be moved by a week or two.
• Come anyway: toothache, swelling, a broken or cracked tooth, a crown or filling that came out, a knocked-out tooth, bleeding that will not stop.
• Not sure which one yours is: message us on WhatsApp, say what hurts and mention the sore. We will tell you straight whether it can wait.

The ADA keeps a plain list of what counts as an urgent problem on its dental emergencies page, if you want to check yours against it.

Why We Postpone Routine Treatment

It is not fussiness. An active cold sore (a cluster of small blisters on or beside the lip, caused by the herpes simplex virus) is contagious while it is weeping and until it has fully scabbed over. Three things make a routine appointment a poor idea at that point:

• The virus can spread. It moves from the sore to fingers, gloves and surfaces, and from fingers to other skin. The eye is the place that matters most, because a herpes infection there is a different and more serious problem.
• The lip gets stretched. Holding the mouth open for half an hour cracks and re-opens the blisters. It hurts you and it slows the healing.
• Nothing is gained by hurrying. A cleaning done today can be done in ten days with the same result and a lip that is not bleeding.

The reverse also deserves one line. A dental appointment does not give you a cold sore, but a long one can set off a recurrence in someone who already carries the virus. We wrote up a real example in the patient whose cold sores arrived before every family event.

If You Need Treatment With the Sore Still There

An abscess does not care that you have a blister. When the problem is a tooth that cannot wait, we treat it and work around the lip. In practice that means gloves changed at the right moments, a barrier ointment on the lip so it is not dragged against instruments, nothing touching the sore itself, and a short, careful procedure rather than a long one where that is possible.

Tell us about the sore when you message or when you arrive. Do not pick at it on the way in, and wash your hands after touching your lip. If the tooth problem is a true emergency, such as swelling that is spreading or a tooth knocked out, come first and mention the cold sore second.

Is It Actually a Cold Sore?

Many people who think they have a cold sore have something else, and the difference changes what you do. A cold sore sits on or just outside the lip border, starts with tingling, and then forms small blisters. A canker sore sits inside the mouth on soft tissue and is not contagious. Our guide to canker sore treatment sets the two side by side.

Two situations are not ordinary cold sores. Blisters or raw patches on the gums and the roof of the mouth, with a fever and a sore throat, can be a first herpes infection, which is more common in children and needs to be seen. And any sore in the mouth that has not healed after three weeks needs examining whatever it looks like; a mouth sore that will not heal is measured by the calendar, not by how it looks.

When a Cold Sore Needs a Doctor, Not a Dentist

This is the part where we send you elsewhere. A cold sore is not a dental problem, and the treatment sits with your pharmacist or family doctor.

• Near or in the eye: eye pain, redness, blurred vision or light sensitivity alongside a cold sore needs a doctor the same day, and an emergency room if you cannot get one.
• A weakened immune system: if you are on chemotherapy, steroids or immune-suppressing drugs, or have an immune condition, a cold sore should be looked at by your doctor early.
• A baby in the house: cold sores can be dangerous for newborns. Keep anyone with an active sore from kissing a young baby.
• They keep coming back: if you get them often, ask your family doctor about antiviral tablets. Antiviral cream from the pharmacy works best applied at the first tingle, before a blister forms.
• Spreading, or longer than two weeks: a doctor should see it.

Booking Around a Cold Sore in Beit Shemesh

The inconvenient truth is that cold sores like a calendar with something in it: a simcha, a Yom Tov, a week of hosting. Beit Shemesh has more of those than most places. If you have a routine visit booked and a sore arrives, message the clinic on WhatsApp on 055-985-8845 and move the appointment. It costs nothing and it is easier than finding out at the door.

If a check-up has been waiting a while, book it for a date well after the sore has gone: dental check-ups in Beit Shemesh. If the problem is a tooth, go straight to the emergency dentist in Beit Shemesh. Same-day appointments are possible at the Harav Kook 28/1 clinic, and you can describe the problem to Dr. Joel in English or Hebrew, whichever you can be most exact in at that hour.

For general guidance on when a dental problem is worth a visit at all, see when to see a dentist. The ADA covers cold sores themselves on its cold sores page.

If you have a cold sore and a tooth that hurts, do not wait for the lip to heal first. Message Urgent Dental Care in Beit Shemesh on WhatsApp, 055-985-8845, tell us about both, and we will say what can wait and what cannot.