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Left Molar Pain: From Diagnosis to Treatment <Written by a Dentist>

D-Day Dental Clinic · 통합치의학과 전문의 2명의 솔직한 치과 이야기 · December 10, 2025

Left Molar Pain: From Diagnosis to Treatment <Written by a Dentist> Left Molar Pain Hello. I’m Oh Tae-hoon, Chief Director of D-Day Dental Clinic. Left molar pain, what happens if...

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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: D-Day Dental Clinic

Original post date: December 10, 2025

Translated at: April 20, 2026 at 6:35 PM

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

Left Molar Pain: From Diagnosis to Treatment

<Written by a Dentist>

Left Molar Pain

Hello.

I’m Oh Tae-hoon, Chief Director of D-Day Dental Clinic.

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Left molar pain, what happens if you just leave it alone?

Left Molar Pain

Surprisingly, many people say, "If I just wait a bit, it’ll get better."

But after treating about 10,000 patients, what I’ve found is this:

There are almost no types of molar pain that simply go away if you endure them.

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In fact, I have seen many cases where people waited too long and ended up needing root canal treatment, or even extraction in severe cases.

Have you been putting it off because you’re busy, or because you’re afraid of the dentist?

Honestly, I completely understand that feeling.

I was the kind of person who used to get sweaty palms just sitting in a dental chair when I was a student.^^;

So today, I’d like to explain directly, as a practicing dentist, what diagnosis and treatment are needed when your left molar hurts.

​​1. Left molar pain: what happens if you leave it untreated​​2. From diagnosis to treatment: how does it proceed?​​
  1. Left molar pain, what happens if you leave it untreated

The causes of molar pain can broadly be divided into cavities, gum disease, and tooth cracks.

The problem is that in the early stages, the symptoms can be vague.

A slight sensitivity to cold food is easy to brush off as nothing serious.

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But if you miss that timing, the cavity spreads deep inside the tooth.

The enamel, the outer surface of the tooth, is the hardest tissue in the human body.

But once the cavity passes through that layer and reaches the inner dentin, the situation changes.

That’s because dentin is softer than enamel, so decay spreads quickly.

Eventually, when the infection reaches the nerve, that’s when severe pain finally appears.

At that stage, root canal treatment becomes unavoidable, and in severe cases, the tooth may not be salvageable.

  1. From diagnosis to treatment, how does it proceed?

First, we take X-rays to check the depth and extent of the cavity.

Even if the tooth looks fine to the naked eye, there may be decay hidden between the teeth.

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The treatment method changes depending on the diagnosis.

If the cavity is in its early stage, a simple resin filling may be enough.

But if the decay is deep, an inlay or crown treatment may be needed,

and if the nerve has been infected, root canal treatment followed by a crown is necessary.

Many people worry about pain during treatment.

If anesthesia is sufficient, there is almost no pain during treatment.

However, some people are afraid of the injection itself.

That’s why, when administering anesthesia, taking a little more time and injecting slowly can help minimize pain.

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Also, procedures that are expected to cause pain can be done in advance at the first visit,

so from the next appointment, you can receive treatment much more comfortably.

If your left molar hurts, now is the fastest time to act.

If it is found early, treatment can be simple, but the longer you wait, the more complicated the treatment becomes and the higher the cost.

Above all, you lose the chance to use your natural tooth for a long time.

If you’re hesitating because of pain, I recommend starting with an examination.

Simply knowing the exact condition will make you feel much more at ease.

D-Day Dental Clinic Chief Director Oh Tae-hoon

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