What Happens If You Don't Get a Root Canal?

A tooth that needs a root canal has a pulp that is infected or dead. Because the infection sits inside the tooth where your immune system and antibiotics cannot fully reach it, it does not clear on its own — the reasoning is explained in will a tooth infection go away on its own. So "leaving it" is really "letting it continue." The question is not *whether* it progresses, but *how fast* and *how far*.

Everyone is different, and timelines vary widely, but the general direction is consistent:

Stage 1: The pain may come and go — or stop

Early on, you might have episodes of pain that ease, or the tooth may go quiet as the pulp dies. This lull is deceptive. The infection is still present and often still advancing while you feel fine.

Stage 2: Infection reaches the bone

Infection travels through the root tip into the surrounding bone, forming an area of inflammation or an abscess. You may notice a gum bump that drains (see that pimple on your gum), tenderness to biting, or a return of pain.

Stage 3: Abscess and swelling

A collection of pus can build, causing throbbing pain and swelling of the gum, cheek or face. This is the point where many people finally seek care — often as an emergency. The warning signs are covered in dental abscess warning signs.

Stage 4: Bone loss and an unsavable tooth

As infection persists, it erodes the bone that supports the tooth. Combined with ongoing decay, this can reach a point where the tooth can no longer be predictably restored — turning a tooth that a root canal could have saved into one that must be extracted.

Stage 5: Spread beyond the tooth

Less commonly but more seriously, infection can spread into deeper tissues of the face and neck. Spreading facial swelling, fever, or difficulty breathing or swallowing is a medical emergency requiring immediate care, not a dental appointment next week.

Delay tends to cost you in several ways at once:

Put simply, the "do nothing" path frequently ends up more painful, more complicated and more expensive than treating the tooth while it is still straightforward.

There is no reliable safe window. Some teeth stay quiet for a long time; others flare within days. Because you cannot predict which, and because waiting only narrows your options, the sensible approach is a prompt assessment — even if the tooth has stopped hurting. If the choice is genuinely between saving and removing the tooth, that is worth deciding deliberately (see root canal vs extraction), not by default through inaction.

• Book an assessment promptly, even if pain has settled.
• Treat urgent signs as emergencies — spreading swelling, fever, or trouble breathing or swallowing.
• Use holding measures wisely — over-the-counter relief as directed and salt-water rinses ease symptoms but do not treat the cause.
• Decide deliberately — if cost or anxiety is the barrier, tell your dentist; there may be options, and the alternatives to doing nothing are worth discussing.

Often the barrier to treatment is not that someone doesn't understand the risk — it is cost or anxiety. Both are worth naming, because both have better answers than doing nothing:

• If it's cost: ask your dentist for a written, itemised estimate and check your coverage. Root canals are frequently covered in part by private plans and, for eligible patients, by the Canadian Dental Care Plan (see does the CDCP cover a root canal). Crucially, the cost of treating the tooth now is usually *less* than the cost of extraction plus a replacement later — so waiting rarely saves money. Talk to the clinic rather than disappearing.
• If it's fear: modern root canals are typically comfortable, and there are practical ways to manage anxiety (see coping with root canal anxiety). Tell your dental team; they can pace the appointment and keep you informed.

Whatever the barrier, a conversation with the clinic almost always beats silent delay.

People frequently ask for a number — "how long have I got?" — and the honest answer is that there isn't a reliable one. Some infected teeth stay quiet for months; others flare into an abscess within days. The variability is exactly why waiting is a gamble: you cannot know which kind of tooth you have, and the downside of guessing wrong (a painful emergency, a lost tooth) is far larger than the effort of a prompt appointment. Rather than trying to time it, treat the diagnosis itself as the signal to act, especially since early treatment is usually simpler and more likely to save the tooth.

My tooth stopped hurting. Doesn't that mean I dodged it?

Usually not. Pain often stops because the pulp died, while infection continues at the root. It is one of the most common reasons treatment gets delayed until an abscess forms.

Can I wait until it's convenient, like after a holiday?

You can try, but infections don't keep a calendar. Flare-ups are unpredictable, and an abscess abroad or before an event is a poor trade for a short delay.

Is losing one tooth really such a big deal?

A single gap can let neighbouring teeth drift and the opposing tooth over-erupt, and it usually needs replacing to protect your bite — so one lost tooth often leads to more treatment, not less.

What if I simply can't afford it right now?

Tell your dentist rather than disappearing. Understanding the options and the estimate (see root canal cost in Ontario) is better than letting the problem — and the eventual cost — grow.

If you have been putting off a root canal, the kindest thing you can do for the tooth (and your budget) is to have it looked at before it escalates. Learn about root canal treatment in Markham or request an appointment. If your face is swelling or you feel unwell, seek urgent care.