Shingles on the face: nerve pain mistaken for toothache

In everyone who has had chickenpox, the virus stays quietly in the nerve ganglia. MSD Manuals explains that the virus often never causes symptoms again, but that sometimes, years later, it wakes up, travels down the nerve fibres to the skin and forms painful blisters there resembling chickenpox. The reason it wakes up is often unknown; diseases and medicines that weaken the immune system are known triggers. According to MSD, on average about a third of people are at risk of shingles during their lifetime, this can rise to half of adults by the age of 85, and shingles is most common after the age of 50.

Feeling from the face is carried by the trigeminal nerve, which has three branches. The first branch supplies the forehead, the area around the eye and the nose; the second the cheek, upper lip, upper jaw and upper teeth; the third the lower jaw, lower lip and lower teeth. When the virus wakes up in the second or third branch, the pain can be felt directly in the teeth. In MSD's description, the pain of shingles starts as a stabbing, burning or strange feeling, and the rash usually follows 2–3 days later. It is in this gap of a few days that the patient often goes to the dentist.

This confusion has real consequences. In a case published in the Journal of Endodontics, a 71-year-old man had root canal treatment on an upper canine tooth with a diagnosis of a dead nerve and infection at the root tip; 3 days later he came back with sores and crusts along the second branch, in the middle of his face and inside his mouth. In a 2026 case in the same journal, a 54-year-old patient came to an emergency dental clinic with severe one-sided pain spreading from back to front in the upper jaw; infection at the root tip of a previously root-filled tooth was suspected at first, but when a rash appeared along the second branch 2 days later the diagnosis changed, and the patient was treated with antiviral medicine without any procedure on the tooth.

There are a few telling signs at home. The first is how the pain spreads: pain from a tooth can sometimes spread too, but the dentist finds a tooth that reproduces the pain in the tests. With shingles, the pain spreads along the jaw on the same side to several teeth, the lip and the cheek; according to MSD, the rash also stays on one side and does not cross the midline of the body. The second is the skin: MSD writes that with shingles the affected area is very sensitive even to a light touch. If lightly touching your cheek, lip or the skin of your jaw on the same side, combing your hair or washing your face causes unusual burning or pain, tell your doctor. The third is accompanying symptoms: the NHS lists headache and feeling generally unwell among the first symptoms of shingles. The fourth is the tests: if the teeth respond normally to cold and tapping tests and there is nothing on the X-ray to explain the pain, shingles should come to mind.

Once the rash appears, the picture usually becomes clear. The NHS writes that the rash appears on only one side of the body, that the spots turn into itchy blisters that ooze fluid and dry out and crust over a few days later, and that a rash on both sides at once is unlikely to be shingles. MSD states that the blisters keep appearing for about 3–5 days and start to dry out after about 5 days; the NHS adds that the rash can take up to 4 weeks to heal completely. According to the NHS, shingles can rarely cause only pain, with no rash at all; in that case the diagnosis is even harder.

The eye is the most dangerous aspect of shingles on the face. When the first branch is involved, the rash appears on the forehead and around the eye. MSD writes that blisters on the tip of the nose (Hutchinson's sign) show a higher risk of eye involvement, but that eye involvement can also develop without a rash on the tip of the nose. In a 2026 meta-analysis combining 14 studies, eye involvement was present in 78% of those with a rash on the tip of the nose and in 34% of those without. So a rash on the tip of the nose is a strong warning, but its absence does not mean the eye is safe; the certainty of the evidence was also rated low or very low.

Another kind of facial nerve involvement can also occur. MSD writes that in the condition where a nerve ganglion near the ear is involved (Ramsay Hunt syndrome), there is ear pain, paralysis on one side of the face and sometimes dizziness, blisters appear in the outer ear canal, and there can be loss of taste on the front two thirds of the tongue. The NHS also states that shingles can affect sight or hearing and make it difficult to move one side of the face. Sudden drooping of one side of the face, however, should always be assessed first for the possibility of a stroke.

Two issues remain after shingles has passed. The first is nerve pain after shingles (post-herpetic neuralgia): the NHS writes that it is common after shingles, that it continues as constant or intermittent burning or stabbing pain in the area where the rash was, with extreme sensitivity to touch and changes in temperature, and that recovery can take from a few months to more than a year; MSD states that it develops in about 10% of people who have had shingles. The second is the teeth: case reviews written on facial shingles report rare but serious consequences weeks to years after shingles, such as death of the tooth nerve, root resorption, tissue death in the jawbone (osteonecrosis) and teeth falling out on their own.

The first list is signs that make it more likely the pain comes from a tooth; for these, see your dentist. If an item from the second list applies to you, shingles or one of its serious consequences should be considered, and you should not wait.

The order deliberately starts from the most dangerous possibility, then moves on to telling the tooth and shingles apart.

1. 1

   Stroke and the eye first

   If there is sudden drooping of the face, arm weakness, slurred speech or sudden loss of sight, the assessment is done in A&E; call 112. If the rash is around the eye or on the tip of the nose, or there is a change in vision, an eye assessment is needed the same day.

2. 2

   The pain is mapped

   MSD writes that doctors ask the patient to describe exactly where the pain is. You are asked whether the pain spreads over one side of a jaw, whether it also includes the skin of the lip, cheek or jaw, and whether it stops at the midline.

3. 3

   The teeth are tested

   The cold test, tapping and biting tests and an X-ray show whether there is a tooth that explains the pain. If no tooth reproduces the pain and the skin is extremely sensitive to touch, the likelihood of shingles grows.

4. 4

   The skin and the inside of the mouth are examined

   Redness, clustered blisters and crusting on one side of the face, and sores on the palate or gums on the same side inside the mouth, are looked for. MSD writes that when a typical rash is seen, the diagnosis is usually made by examination, and that in doubtful cases a sample is taken from a blister to look for the virus.

5. 5

   Antiviral treatment and pain control

   MSD writes that treatment should start as soon as possible, ideally in the period before the rash, and that treatment started 72 hours after the rash appears is less effective. The NHS states that a pharmacist can also give the same antiviral medicines as a GP, and that painkillers, steroid tablets or medicines for nerve pain can be used for the pain.

6. 6

   Follow-up on the dental side

   It is sensible to have the teeth on the same side checked after shingles has passed. Case reviews report that, rarely, the tooth nerve can die later and root resorption and tissue death in the jawbone can develop; if new toothache appears on the same side months later, tell your dentist you have had shingles.

The treatment of shingles on the face falls not to the dentist but to the GP, dermatology, infectious diseases and, where needed, an eye or ear, nose and throat specialist. The dentist's job is not to miss the diagnosis and to prevent unnecessary procedures.

The following are wrong decisions often seen with this condition. We set them out so that, whichever clinician you see, you can ask the right questions.

The timescales vary from person to person. The sequence below is the usual course described by the NHS and MSD; the plan of the doctor following you takes priority.

1. The 2–3 days before the rash

   One-sided pain, tingling or itching; sometimes headache and feeling unwell. During this period, discuss the possibility of shingles with your clinician before any procedure on a tooth.

2. The first days of the rash

   Blisters keep appearing for about 3–5 days. This is the most valuable period for antiviral treatment; do not miss the first 3 days of the rash.

3. Crusting and healing

   According to MSD, the blisters start to dry out after about 5 days; the NHS writes that the rash can take up to 4 weeks to heal completely. Until they crust over, the blisters can give chickenpox to people who have not had it.

4. After the rash has gone

   The skin can stay painful for weeks. MSD defines pain lasting more than 3 months after the last crust as post-herpetic neuralgia; the NHS writes that this pain can last from a few months to more than a year.

We do not give a single figure here, because the treatment of shingles on the face falls not to the dentist but to the doctor, and its scope depends on the nerve branch involved, eye or ear involvement and the course of the pain. On the dental side and in general, these are the items that determine the scope:

When the diagnosis is made

When shingles is considered in the period before the rash, unnecessary dental procedures are avoided.

Eye or ear involvement

These pictures need a specialist examination and closer follow-up.

Nerve pain after shingles

If the pain lasts a long time, medicine and follow-up appointments can stretch over months.

Rare dental consequences

Nerve death or bone problems that develop later may need separate dental treatment.