Dental problems rarely happen at a convenient time. A tooth can chip during a weekend hockey tournament, a filling can fall out while you’re travelling, or a toothache can flare up during a school break when your routine is already off. In those moments, knowing the first steps to take can reduce pain, protect the tooth, and help prevent a small problem from turning into a bigger one.
This guide is a calm, practical “what to do right now” reference for common urgent dental situations. These steps are meant as short-term first aid, not a replacement for professional care. If you are unsure, it is safer to call your dental office and describe what’s happening.
What counts as a dental emergency?
A “dental emergency” usually means there is a real risk of infection spreading, uncontrolled bleeding, significant trauma, or a time-sensitive chance to save a tooth. In practical terms, seek urgent dental care if you have any of the following:
Severe or worsening pain that is hard to manage, facial swelling, a pimple-like bump on the gum, pus or a bad taste that suggests infection, a tooth that is knocked out or pushed out of position, a large crack/break (especially after trauma), bleeding that will not stop, or an injury that involves the jaw, head, or possible concussion.
If the issue is mild and stable (for example, a tiny chip with no pain), you still want to book an appointment soon, but it may be safe to wait for regular hours. When in doubt, call and let your dentist triage it with you.
What to do for a chipped or cracked tooth
A chipped tooth can range from a small cosmetic edge to a deeper crack that reaches the nerve. Your goal right now is to protect the tooth and the soft tissues, keep the area clean, and avoid making the crack worse.
Start by gently rinsing with warm water to clear debris and check for bleeding. Apply a cold compress to the cheek to reduce swelling and discomfort. If the tooth has a sharp edge that is cutting your tongue or cheek, you can cover the spot with orthodontic wax (sold at most pharmacies) until you can be seen. Avoid biting or chewing on that side, and skip very hot, very cold, or hard foods. (mouthhealthy.org)
If the tooth broke during an accident (sports, fall, impact), treat it as time-sensitive even if pain is not severe. Deeper cracks can be difficult to see without an exam, and trauma can affect neighbouring teeth as well. If you notice bleeding from within the tooth, that is more urgent and you should contact a dentist as soon as possible.
What to do if a filling falls out
A lost filling is common, and it can become painful because the inner tooth structure may be exposed to temperature, pressure, and bacteria. The immediate goal is to protect the area and prevent sensitivity while you arrange care.
Rinse gently with warm water and keep the area clean with normal brushing (carefully) and flossing. Avoid chewing on that side and avoid sticky foods that can pack into the space. If the tooth feels sensitive or the cavity is catching food, you can use an over-the-counter temporary dental cement from the pharmacy as a short-term cover. Some people use sugar-free gum as a brief placeholder, but dental cement is generally a better choice when available. Do not use household glue. (Cleveland Clinic)
Even if discomfort is mild, don’t let this sit for too long. The longer the tooth stays unprotected, the higher the risk of decay, fracture, or inflammation that can turn into a bigger repair.
What to do for a sudden toothache
Toothaches are one of the most common “it came out of nowhere” dental problems. The pain may be caused by a deep cavity, a cracked tooth, gum inflammation, an inflamed nerve, or an early infection. Right now, you are trying to reduce irritation and rule out a simple “something stuck” situation.
Rinse with warm water and gently floss around the painful tooth to remove anything trapped between the teeth. This matters more than people expect, because pressure from trapped debris can mimic a serious toothache. Avoid putting aspirin directly on the gums or the tooth, as it can burn soft tissue. (mouthhealthy.org)
A cold compress on the cheek can help with inflammation and discomfort. Avoid heat on the jaw or face, especially if you suspect infection, because heat can worsen swelling. (cda-adc.ca)
If pain is severe, persistent, waking you at night, or paired with swelling, it should be assessed quickly. If tooth pain keeps recurring, you may also want to read our post “How to Know If You Need a Root Canal”, which outlines common warning signs that a tooth nerve may be inflamed or infected.
What to do if a tooth gets knocked out
A knocked-out tooth (an avulsed tooth) is one of the most time-sensitive dental emergencies. If it is an adult (permanent) tooth, quick action can significantly improve the chances of saving it. (mouthhealthy.org)
Step one is to find the tooth and handle it by the crown only (the chewing surface). Do not touch the root. If the tooth is dirty, gently rinse it with water only. Do not scrub it, do not dry it, and do not wrap it in a tissue or cloth. (American Association of Endodontists)
If you can, try to place the tooth back into the socket carefully and hold it there by gently biting down. If you cannot reinsert it, keep it moist at all times. The best options are milk, a tooth preservation kit, or tucked inside the cheek (only if the person is alert and there is no choking risk). Avoid storing it in plain tap water for extended periods. Then get to a dentist immediately. Many guidelines emphasize getting to a dentist within about 30 minutes when possible. (mouthhealthy.org)
Important exception: if there was loss of consciousness, confusion, vomiting, or any concern about concussion or head/neck injury, that needs to be treated first. In that scenario, go to the ER and bring the tooth with you, kept moist as above.
What not to do (common mistakes that make things worse)
A few “quick fixes” can create avoidable damage.
Do not ignore significant pain or swelling and hope it passes. Dental infections can escalate and are much easier to treat when addressed early.
Do not apply aspirin directly to gums or the painful area. It can burn tissue.
Do not use heat on the jaw for tooth pain. If infection is involved, heat can worsen swelling.
Do not use household glues to “stick” a filling, crown, or tooth fragment in place.
Do not aggressively pick at a broken area or try to “smooth” a tooth yourself. Cover sharp edges and get it evaluated.
Do not leave a knocked-out adult tooth dry. Moisture and time are critical.
When to call the dental office vs. when to go to the ER
In most cases, the right first call is your dental office. Dentists are equipped to treat tooth fractures, lost fillings, abscesses, and dental trauma directly, and many practices reserve space for urgent cases.
Go to the ER (or call emergency services) if you have any of the following red flags: difficulty breathing or swallowing, rapidly spreading facial/neck swelling, uncontrolled bleeding that does not stop with pressure, suspected jaw fracture, severe trauma with head injury symptoms, or signs of a more serious systemic illness.
Also consider the ER if your dental office is closed and you have severe, unmanageable symptoms. The ER can help stabilize pain and swelling until you can see a dentist, but dental treatment is usually still required to fix the underlying problem.
Next step: get assessed promptly (even if you feel better)
A key point patients often miss is that symptoms can calm down temporarily while the underlying issue remains. A cracked tooth may stop aching, or a toothache may ease after rinsing and flossing, but the tooth could still be compromised. An exam and X-rays determine whether the tooth needs a simple repair, a new restoration, or deeper treatment.
If you are in St. Catharines or nearby and you are dealing with an urgent dental issue, you can contact our office right away so we can help you decide what to do next and arrange timely care: https://stcatharinesdentist.ca/contact-us/ or our Emergency Dentistry page: https://stcatharinesdentist.ca/emergency-dentistry/ (phone: 905-937-4673).