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[ Magok-dong Dental Clinic_03 ] How Painful Is Root Canal Treatment? An Honest Explanation

Seoul DIA Dental Clinic · 서울디아치과의원 · August 5, 2026

Hello. We are Seoul Dia Dental Clinic, guiding patients toward the right treatment with accurate diagnoses at Magok Station. This is the third installment in our root canal treatme...

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This page is an English translation of a Korean Naver Blog archive entry. For exact wording and source context, verify against the Korean archive original and the original Naver post.

Clinic: Seoul DIA Dental Clinic

Original post date: August 5, 2026

Translated at: August 17, 2026 at 3:18 PM

Medical note: This translation does not guarantee medical accuracy or suitability for treatment decisions.

Hello.

We are Seoul Dia Dental Clinic,

guiding patients toward the right treatment with accurate diagnoses at Magok Station.

This is the third installment in our root canal treatment series!

Today’s topic

is probably the one you have been waiting for the most in this series. Haha.

Before undergoing root canal treatment,

the first thing most people search for

is this very question.

"How painful is root canal treatment? ㅜㅜ"

When you ask people around you,

some say, "I really thought I was going to die,"

while others say, "It wasn’t that painful."

Many people end up even more confused,

wondering which answer is correct.

Today, we’ll talk about it honestly.

Is root canal treatment painful during the procedure?

[ Magok-dong Dental Clinic_03 ] How Painful Is Root Canal Treatment? An Honest Explanation image 1

Magok-dong Dental Clinic_ Dental anesthesia

To give you the conclusion first~

It is usually not very painful during the treatment.

Root canal treatment

is performed under local anesthesia,

so when the area is sufficiently numb,

you generally do not feel pain.

"I heard that anesthesia doesn’t work for root canal treatment."

That is incorrect information.

In the past, there were times when treatment was more painful

because anesthesia techniques were not as advanced as they are today.

However, anesthesia methods and medications have improved significantly,

so when treatment is performed under sufficient anesthesia,

there is usually little pain during the procedure.

That said, it does not mean you will feel absolutely nothing.

You may feel pressure, a pulling sensation,

or the sensation of instruments touching the tooth.

These are not painful sensations,

but natural sensations that can be felt

while the area is anesthetized.

If you feel pain during the procedure,

please raise your hand and let us know at any time.

It can be adequately managed with additional anesthesia.

I heard that anesthesia may not work well if the inflammation is severe. Is that true?

[ Magok-dong Dental Clinic_03 ] How Painful Is Root Canal Treatment? An Honest Explanation image 2

Magok-dong Dental Clinic_ Tooth with severe inflammation

That is true.

When inflammation is severe,

the inflamed area can create an acidic environment,

which may reduce the effectiveness of the anesthetic.

In such cases,

we may increase the anesthetic dosage

or change the method of anesthesia.

When the inflammation is extremely severe,

there are also cases where we first calm the inflammation

and then proceed with treatment.

What about pain after the treatment?

Well... to be honest~

Once the anesthesia wears off,

you may feel some degree of pain.

[ Magok-dong Dental Clinic_03 ] How Painful Is Root Canal Treatment? An Honest Explanation image 3

Magok-dong Dental Clinic_ Root canal treatment pain

[ The day of treatment–Day 2 ]

As the anesthesia wears off,

the pain begins in earnest.

You may feel a dull, throbbing sensation

or soreness around the tooth.

This is usually the most painful period.

However, to be honest,

in most cases it is not pain that is impossible to endure.

If you take the prescribed pain medication on time,

it can usually be managed well enough

to allow you to continue your daily activities. ^-^

There is no need to endure it without pain medication.

Taking it on time is a much wiser approach.

[ From Day 3 onward ]

In most cases, the pain gradually decreases.

As treatment sessions continue,

the pain often becomes less intense.

Pain after root canal treatment: These symptoms are normal

After root canal treatment,

the symptoms below

are common reactions.

  • Slight sensitivity or pain when the tooth is touched

  • Slight discomfort when chewing

  • A throbbing sensation for 1–2 days after treatment

These symptoms

are temporary reactions that occur

because the tissues surrounding the tooth

are stimulated during the treatment process.

They usually improve within 2–3 days.

Visit us right away in these cases

[ Magok-dong Dental Clinic_03 ] How Painful Is Root Canal Treatment? An Honest Explanation image 4

Magok-dong Dental Clinic_ Gum swelling

However, in the following cases,

the symptoms may not be a normal reaction.

  • Pain that becomes worse even after 2–3 days

  • Swollen gums or visible pus

  • Loss of the temporary filling

  • A broken tooth

  • The development of a fever

If these symptoms are left untreated,

they may lead to more serious problems.

Please do not put off your visit; come in right away.

Situations in which root canal treatment may be more painful

Even with the same root canal treatment,

it may be more painful in the following cases.

1. When the inflammation is severe

A tooth with a long-standing infection

may experience more stimulation

during the treatment process.

This is why receiving treatment early

can also reduce pain.

2. When the roots are complex

As we mentioned in Part 2,

when a tooth has multiple roots, like a molar,

or when the roots are curved,

the treatment may take longer,

which may also make the pain more noticeable.

3. When you are sensitive to pain

Even in the same situation,

the degree of pain people feel

varies from person to person.

If you are usually sensitive to pain,

please let us know in advance.

We will prepare accordingly.

Fear can intensify pain

Let us also share one point

about the psychological aspect.

In fact, studies have found

that people with dental phobia

tend to feel pain more intensely

even during the same treatment

than people without dental phobia.

When you are tense, your muscles stiffen,

and you become more sensitive to pain.

That is why, before treatment,

simply receiving a thorough explanation in advance

of the treatment sequence

and the sensations you may experience

can help reduce pain.

When you know what to expect, it is less frightening,

and when it is less frightening, it actually hurts less.

At Seoul Dia Dental Clinic,

before root canal treatment,

we provide a thorough explanation in advance

of how the procedure will be carried out.

If you experience any discomfort during treatment,

please let us know at any time.

We will work with you to make the procedure as comfortable as possible,

including administering additional anesthesia

or adjusting the pace of treatment.

We offer convenient consultations

through Naver TalkTalk and appointments.

Feel free to check with us—there is no need to feel pressured.

[ This post was written in accordance with the Medical Service Act for the purpose of providing accurate information about dental surgeries and procedures. Infections and side effects may occur after surgery, so you should decide to undergo surgery (or a procedure) after consulting sufficiently with a qualified medical professional. ]

[ "What is root canal treatment?" — An introductory series ]

  • Why is root canal treatment necessary? The connection to pulpitis

  • How is root canal treatment performed from beginning to end?

  • How painful is root canal treatment? An honest explanation

  • Is a crown absolutely necessary after root canal treatment?

  • Root canal treatment costs: When insurance coverage applies and when it does not

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