A sip of cold water makes you wince. Later, one tooth starts throbbing while you are trying to sleep. It can be difficult to tell whether you are dealing with ordinary sensitivity or something that needs an urgent appointment.
Toothache is a symptom, not a diagnosis. Paying attention to when it happens, how long it lasts, and whether swelling or fever is present helps you decide what to do next.
The short answer: Toothache commonly comes from decay, irritation or inflammation inside a tooth, cracks, or problems around the gums. Persistent or recurring pain needs a dentist, while severe pain, swelling, or fever calls for urgent assessment. Difficulty breathing or swallowing means you need emergency medical help immediately.
1. What causes toothache?
A tooth has a hard outer covering and living tissue inside, called the pulp, which contains nerves and blood vessels. Pain may start in that tissue, the root area, or the structures supporting the tooth.
- Tooth decay: A cavity can allow irritation to reach deeper layers. Early decay may cause no pain, so the absence of discomfort does not prove a tooth is healthy.
- Inflamed pulp: Deep decay, injury, or other irritation can inflame the tissue inside a tooth. Pain may become spontaneous or continue after a hot or cold drink.
- Cracks and damaged fillings: A small fracture or a loose restoration can cause discomfort when chewing, even when the problem is hard to see.
- Gum and wisdom tooth problems: Inflamed tissues, trapped food, or infection around a partly erupted wisdom tooth may feel like tooth pain.
- Sensitivity and grinding: Exposed tooth surfaces can react to temperature. Clenching or grinding can strain teeth and jaw muscles.
An abscess is a collection of pus caused by infection and needs urgent dental treatment.
2. What the pattern of pain can tell you
Brief pain triggered by cold may fit sensitivity, but a cavity or crack can produce a similar sensation. Pain that continues after the trigger has gone deserves assessment rather than repeated testing with hot or cold drinks.
Pain when biting may involve a crack, a restoration, or inflammation around a root. Avoid repeatedly pressing or tapping the tooth to identify it.
Throbbing or night-time pain is also not a diagnosis by itself. Tell the dentist whether it wakes you, occurs without eating, or spreads toward the ear or jaw.
Write down when symptoms started and whether there was a recent filling, injury, or broken tooth.
3. When to book care and when to act urgently
Arrange an appointment if pain lasts more than two days, repeatedly returns, or makes chewing uncomfortable. New sensitivity affecting one tooth also deserves a check if it persists. Two days is not a waiting requirement: contact a dentist earlier if symptoms worry you.
Ask for urgent dental care today if you have facial or gum swelling, fever with dental pain, pus or a bad taste associated with swelling, or severe pain disrupting sleep and daily activities. A suspected abscess should not wait for a routine check-up.
Seek emergency medical care immediately if swelling affects breathing, swallowing, or speaking; spreads toward the eye or neck; or is accompanied by major difficulty opening your mouth. Call your local emergency service instead of waiting for an online reply.
These distinctions follow published guidance on when toothache needs professional care and urgent signs of a dental abscess. If you cannot reach your usual dentist, look for a local urgent dental service.
4. What you can do while waiting
The aim at home is to reduce irritation until you receive care. Temporary improvement does not repair a cavity, seal a crack, or remove the source of an infection.
- Choose soft foods and chew on the comfortable side.
- Avoid foods and drinks that clearly trigger pain, especially very hot, cold, or sugary items.
- Clean gently with a soft toothbrush. Do not scrub painful gums or force cleaning tools into the sore area.
- If you need pain relief, ask a pharmacist what is suitable for your health circumstances and follow the product instructions.
Tell the pharmacist about pregnancy, allergies, existing illnesses, and medicines you already take. Do not combine products without checking their ingredients and suitability.
Do not put aspirin, alcohol, or caustic substances directly against a tooth or gum. Do not try to drain a swelling or use leftover antibiotics. If pain settles unexpectedly, keep the appointment: symptom relief alone does not show that the underlying problem has healed.
5. What the dentist checks and how to prevent recurrence
The dentist will ask about the pain, inspect your teeth and gums, and check biting and tooth responses where appropriate. An X-ray may be needed to investigate areas that are not visible during a surface examination.
Treatment depends on the cause. It might involve repairing a filling, treating decay, addressing gum inflammation, or managing sensitivity. More extensive damage may require root canal treatment or another procedure; extraction is not the automatic outcome of toothache.
Ask what was found, which options are available, and what to expect after treatment.
For prevention, brush twice daily with fluoride toothpaste, clean between teeth regularly, and reduce frequent sugary snacks and drinks. Arrange check-ups at intervals recommended for your needs. Guidance on how tooth decay develops and is prevented explains why daily care matters even when nothing hurts.
6. Start with a free online dental screening
Unsure how to describe a visible concern? Upload a photo to DentalAI's free AI dental check for an initial screening, then talk to a real dentist online for free. Share when the pain started and any swelling or fever alongside the photo.
A photograph cannot assess the tooth nerve, reveal every cavity, or rule out infection. AI screening is a first check, not a diagnosis; a dentist must confirm the findings. Urgent symptoms require in-person care without waiting for a screening result.
This article provides general information only, not a diagnosis, and does not replace an examination by a licensed dentist. For pain, swelling, or fever, contact a dentist; for difficulty breathing or swallowing, contact emergency services immediately.