Sudden tooth sensitivity to hot and cold

What this usually means

Sudden tooth sensitivity to hot or cold is common, but it is not something to ignore. It can happen when a tooth has enamel wear, a cavity, a cracked tooth, gum recession, or a problem inside the tooth.

This page is general information only. It cannot tell you the cause, and it cannot replace an exam by a licensed dentist. If the sensitivity is new, one-sided, or sharp, it is worth getting checked.

If you are also dealing with swelling, bleeding, or severe pain, look at our symptom help page or get help finding care through Get Matched.

What to do next

1. Make an appointment with a licensed dentist as soon as you can.
2. Until you are seen, avoid very hot, very cold, or sugary drinks and foods if they trigger pain.
3. Use a soft toothbrush and brush gently.
4. If you need help finding someone open today, use our free help page to start a search.
5. If the sensitivity came after a hit, crack, or bite injury, tell the dentist that when you call. You do not need to write it out here on this page.

SteadyTooth is free for readers. We only collect contact details only — no medical information needed.

When it could be urgent

Some tooth problems need same-day care. Call 911 or go to the ER now if you have trouble breathing or swallowing, swelling spreading toward the eye or neck, or uncontrolled bleeding.

If the pain is severe, if the tooth looks broken, or if swelling is starting, a dentist should see you quickly. A dentist can check whether the tooth needs urgent treatment, but this page cannot diagnose the cause.

If you are not sure where to go, a licensed dentist is still the right first call for most tooth pain.

Simple self-care while you wait

You can take a few basic steps to stay more comfortable while you look for care.

Rinse gently with warm salt water. Use a cold compress on the cheek if the area feels sore. If a tooth was knocked out, save it in milk and get dental help right away. Over-the-counter pain relief may help if you can take it safely and as directed on the label.

Do not put heat on a swollen face. Do not ignore worsening pain, and do not assume the problem will pass on its own.

Cost and coverage

Cost can vary by city, dentist, and what the exam shows. Some people need only an exam and X-rays. Others may need more treatment, which changes the price.

Dental coverage and rules vary by state. If you want a rough idea before you call, see our costs page. SteadyTooth does not charge the reader for matching help.

If you are new to the United States or nervous about calling, we can help you move step by step.