Toothache: Common Causes and How to Get Relief

A toothache has a way of making itself impossible to ignore. Whether it starts as a dull ache after a meal or wakes you at 2 AM with a throbbing that won’t quit, tooth pain is your body’s way of flagging that something needs attention. The cause might be straightforward — or it might need prompt dental care.

Either way, understanding what’s behind the pain helps you make the right call.

What Causes a Toothache?

Tooth pain isn’t a condition — it’s a symptom. The underlying cause can vary widely, which is why the same level of pain can mean different things for different people.

• Tooth decay is the most common culprit. When bacteria break down the enamel and reach the inner layers of the tooth, the nerve becomes exposed or irritated, triggering pain — especially with sweet, hot, or cold foods.
• Cracked or fractured teeth often cause sharp pain when biting down or an intermittent ache that comes and goes. Cracks aren’t always visible, which makes them tricky to diagnose on your own.
• Dental abscess — an infection at the root or in the surrounding gum — tends to produce intense, throbbing tooth pain. It may come with swelling, a bad taste in the mouth, or a visible bump on the gum. This is one of the more serious causes and should not be left untreated.
• Exposed roots from gum recession cause sharp sensitivity, particularly to temperature changes. The root surface lacks the enamel protection of the tooth crown, making it highly reactive.
• Sinus pressure can mimic a toothache, particularly in the upper back teeth. The proximity of these tooth roots to the sinus cavity means sinus inflammation can cause a broad, dull ache across multiple teeth.
• Teeth grinding (bruxism) places ongoing stress on the teeth and jaw. Many people grind at night without realising it and wake up with soreness across multiple teeth or a tension headache.

Why a Toothache Often Feels Worse at Night

When you’re upright during the day, blood flows away from the head. Once you lie flat, pressure increases around already inflamed tissue, which can intensify the pain.

There’s no activity to distract from it either, so it becomes the only thing you can focus on.

This is particularly common with abscesses and deep decay, where the nerve is already under significant pressure. Night-time flare-ups are often the reason people come in first thing in the morning — and it’s a completely valid reason to seek care promptly.

At-Home Relief Before Your Appointment

At-home measures won’t fix the cause, but they can make the wait more manageable.

• Salt-water rinse: Use a mixture of half a teaspoon of salt and warm water to rinse your mouth gently for 30 seconds. This can reduce inflammation and help clear debris around the affected area. Repeat a few times a day.
• Cold compress: Hold a cloth-wrapped cold pack on the outside of your cheek for 15–20 minutes to ease swelling and provide temporary relief.
• Over-the-counter pain relief: Ibuprofen or paracetamol, taken as directed on the packaging, can help manage short-term discomfort. Ibuprofen has an anti-inflammatory effect, which can be useful if swelling is present. Always follow dosage instructions and consult a pharmacist if unsure.
• Avoid triggers: If heat or cold worsens the pain, avoid those foods and drinks and try not to chew on the affected side until you’ve seen a dentist.

When to See a Dentist Urgently

Some toothaches can wait a day or two. Others need prompt attention.

See your Campbelltown dentist as soon as possible if you notice:

• Swelling in the face, jaw, or gum — particularly if it’s spreading or limiting how wide you can open your mouth
• Fever alongside tooth pain, which can indicate a spreading infection
• Pain lasting more than a day or two that isn’t responding to over-the-counter relief.
• Difficulty swallowing or breathing — seek emergency care immediately.
• A visible abscess or pus near the affected tooth
• Trauma to the tooth or jaw following an injury.

Dental infections don’t resolve on their own, and leaving an abscess untreated carries real health risks.

How a Dentist Diagnoses the Cause

Because tooth pain can come from several different sources, a clinical exam is the only reliable way to identify what’s actually happening.

At your appointment, your dentist will:

• Take a clinical history — asking about the type of pain, when it started, what makes it better or worse, and whether there have been any recent changes to the tooth or surrounding area.
• Perform a visual and tactile examination — checking for visible decay, cracks, swelling, and gum condition around the affected tooth and nearby teeth.
• Use dental X-rays — imaging reveals what’s happening beneath the surface, including decay between teeth, bone loss, abscess formation, or root issues not visible to the naked eye.
• Apply diagnostic tests — temperature or percussion testing helps isolate which tooth is the source and how the nerve is responding.

Frequently Asked Questions About Toothache

Can a toothache go away on its own?

Occasionally, mild sensitivity settles down — but pain caused by decay, infection, or a cracked tooth will not resolve without treatment. If severe pain stops suddenly, this can sometimes mean the nerve has died, which still requires dental attention.

What does a throbbing tooth mean?

Throbbing tooth pain often points to inflammation or infection, particularly an abscess. It’s a sign that something is actively wrong and should be assessed promptly.

Is it safe to take painkillers every day for toothache relief?

Over-the-counter pain relief is intended for short-term use. Regular reliance on it masks a worsening problem. See your Campbelltown dentist to address the cause directly.

Why does my toothache get worse when I eat or drink?

Pain triggered by hot, cold, sweet, or acidic foods often points to exposed dentine, a cracked tooth, or decay that has reached the inner layers of the tooth. The sensitivity itself needs to be assessed.

Can sinus issues cause tooth pain?

Yes. Because the upper back tooth roots sit near the sinus cavity, sinus congestion or infection can create pressure that mimics tooth pain. This type of ache is usually felt across several teeth rather than in a single spot and may coincide with facial pressure or congestion.

Toothache Treatment in Campbelltown

If you’re dealing with tooth pain in Campbelltown or the surrounding area — including Rosemeadow, Ambarvale, Glen Alpine, and Narellan — we’re here to help.

At Marketfair Dental Care, we properly assess toothache by examining the tooth, taking X-rays as needed, and identifying the cause so we can discuss the right treatment with you.

Same-Day Dental Emergency Appointment Available in Campbelltown

Call us on (02) 4620 0800 or book online. You’ll find us at Marketfair Campbelltown, Shop 21B, 4 Tindall St, Campbelltown.