Exposed Tooth Nerve: Why It's So Painful and What to Do

Few things produce pain quite as intense as an exposed tooth nerve. That sharp, electric shock of agony when air, food, or liquid touches the wrong spot is your body's unmistakable distress signal. It means you need to see a dentist sooner rather than later. Here's why it happens, how to manage the pain while you wait, and what treatment to expect.

How Does a Tooth Nerve Become Exposed?

Inside every tooth is a soft tissue called the pulp, which contains the nerve and blood supply. This is normally protected by layers of hard enamel on the outside and dentine beneath. When these protective layers are compromised, the nerve can become exposed to the mouth. That's when the severe pain begins.

Common causes include:

• Deep cavity: Tooth decay that has progressed through the enamel and dentine until it reaches the pulp. This is one of the most common causes, especially if a cavity has been left untreated for some time
• Cracked tooth: A crack in the tooth can extend deep enough to expose the nerve, sometimes after biting something hard or from long-term grinding
• Lost filling: When a filling falls out, the cavity underneath is exposed again. If the original cavity was deep, the nerve may now be unprotected
• Broken tooth: Trauma or biting on something unexpectedly hard can fracture a tooth severely enough to expose the pulp
• Severe gum recession: When gums recede significantly, the root surface of the tooth becomes exposed. Roots don't have the same thick enamel covering, so the nerve is closer to the surface and more easily irritated

In severe pain right now? Search for emergency dental appointments near you.

Symptoms of an Exposed Nerve

An exposed or near-exposed nerve typically produces symptoms that are hard to ignore:

• Intense, sharp pain: Often described as shooting, electric, or stabbing. Triggered by touch, temperature, or even air passing over the tooth
• Extreme sensitivity: To hot, cold, sweet, and acidic foods and drinks. Even breathing in cold air through your mouth can trigger a jolt of pain
• Spontaneous pain: Pain that comes on without any trigger, often throbbing and persistent. This may indicate the nerve is already inflamed or infected
• Pain that keeps you awake: Nerve pain from teeth is notorious for worsening at night when you lie down, due to increased blood flow to the head

Emergency Pain Relief at Home

While waiting for your dental appointment, these measures can help manage the pain. They are temporary. They won't fix the problem, but can make the wait more bearable:

• Ibuprofen + paracetamol: Taking both together (or alternating) is more effective than either alone for dental pain. Adults can take ibuprofen 400mg and paracetamol 500mg to 1g, following packet instructions. Don't exceed the stated doses
• Clove oil (eugenol): Available from pharmacies. Apply a small amount to a cotton bud and dab it directly on the affected area. It has natural anaesthetic and antibacterial properties and can provide short-term numbing
• Avoid hot, cold, and sweet: Stick to lukewarm, bland food and drink on the opposite side of your mouth
• Warm salt water rinse: Half a teaspoon of salt in a glass of warm water. Rinse gently. This helps keep the area clean and can soothe inflammation
• Keep your head elevated at night: An extra pillow can help reduce blood flow to the area and ease the throbbing
• Temporary filling material: If a filling has fallen out, pharmacies sell temporary filling kits (such as DenTek or Boots own brand) that can cover the exposed area and reduce sensitivity until you see your dentist

Why You Must See a Dentist

An exposed nerve will not get better on its own. The dental pulp has very limited ability to heal itself once exposed to bacteria in the mouth. Without treatment:

• Bacteria will infect the nerve, leading to pulpitis (inflammation of the pulp) and eventually an abscess
• The pain may temporarily ease if the nerve dies, but this is not healing, it's the nerve tissue dying. The infection continues and can spread
• An untreated infection can spread to the surrounding bone and tissue, potentially causing facial swelling and, in rare but serious cases, systemic illness

If you're experiencing a toothache that won't go away, don't wait. Early treatment is almost always simpler and less expensive than dealing with the complications of delay.

Treatment Options

What your dentist recommends will depend on how much damage has occurred and whether the nerve can be saved:

• Filling: If the exposure is very small and caught early, your dentist may be able to place a protective lining (such as calcium hydroxide) over the nerve and seal the tooth with a filling. This gives the nerve the best chance of recovering
• Crown: If the tooth has lost a significant amount of structure but the nerve is still viable, a crown can protect and restore the tooth
• Root canal treatment: If the nerve is irreversibly damaged or infected, root canal treatment removes the diseased pulp, cleans and seals the inside of the tooth, and is usually followed by a crown. Despite its reputation, modern root canal treatment is typically no more uncomfortable than having a filling
• Extraction: In cases where the tooth is too damaged to save, removal may be necessary. Your dentist can then discuss replacement options such as a bridge, denture, or implant

Treatment Cost Comparison

Here is what you can expect to pay for exposed nerve treatment in the UK.

Don't Delay Treatment

The single most important thing to take away from this article is: don't wait. Exposed nerve pain is your tooth telling you it needs help now. The sooner you see a dentist, the more likely it is that the tooth can be saved with a straightforward treatment.

Every day of delay increases the risk of infection and the complexity of the treatment needed. A tooth that could have been saved with a simple filling may end up needing root canal treatment or extraction if left too long.

On the NHS, treatment for an exposed nerve typically falls under Band 2 (£76.60) in England. Private costs will vary but your dentist can discuss all options with you.

Frequently Asked Questions