Cold sores on the lips: symptoms, contagiousness, and dental visit

Lip cold sores often begin with tingling or itching, followed by blister formation. They are contagious, so inform the clinic about an active lesion before a planned dental visit.

How do cold sores manifest?

There may be itching or tingling, followed by painful blisters on the lip or surrounding skin. They eventually burst and become covered with a crust. Cold sores are usually caused by the herpes simplex virus and may recur.

When are they contagious?

Cold sores can be contagious from the first tingling signs until complete healing. Avoid touching the lesion unnecessarily, wash hands before and after contact, and do not share items that touch the lips. Do not kiss others during active cold sores, especially infants.

Is it possible to go to the dentist?

Before the visit, call and inform that there is an active lesion on the lip, and whether the treatment is planned or urgent. The clinic will advise based on the situation how to proceed and whether to reschedule the visit. In case of severe tooth pain or swelling, do not delay contact.

How to care for it?

The doctor or pharmacist may advise on suitable measures. Do not pick at the crust and wash hands after contact. If food irritates, avoiding obviously unpleasant acidic or salty products and ensuring fluid intake may help.

When is a doctor’s consultation needed?

Seek care if the lesion is very painful or large, does not start healing, recurs frequently, the diagnosis is unclear, or the immune system is weakened. If the lesion is near the eye or eye symptoms appear, immediately consult a doctor.

How is a cold sore different from a mouth ulcer?

Cold sores often start with tingling, followed by small blisters on or around the lip. An aphtha usually appears as a small painful ulcer inside the mouth. However, various rashes may look similar; if in doubt, consult a doctor and do not guess the diagnosis.