Tooth Pain at Night: What Should You Do?

1. Tooth Decay: When a Cavity Starts Causing Pain

Tooth decay often develops quietly. Bacteria gradually damage the enamel, creating a cavity that can grow deeper before you notice anything wrong.

As the damage progresses, you may experience:

• Sensitivity to sweets and cold drinks.
• Sharp pain when eating.
• Discomfort when biting.
• Persistent toothache if decay reaches deeper layers

A small cavity may cause little or no discomfort. But once decay reaches the inner structures of the tooth, treatment can become more involved.

The important thing: A tooth doesn't need to hurt to have a cavity.

2. Pulpitis: When the Tooth's Nerve Becomes Inflamed

Beneath the hard outer layers of your tooth is the dental pulp, soft tissue containing nerves and blood vessels.
When bacteria reach this area, often through deep decay or a crack, the pulp can become inflamed. This is called pulpitis.

You might notice:

• Pain that lingers after drinking something hot or cold.
• Spontaneous throbbing or sharp pain.
• Discomfort that wakes you during the night.
• Pain that becomes difficult to locate.

Depending on the extent of the inflammation, the pulp may recover or require root canal treatment.
That lingering ache after a sip of cold water could be more than ordinary sensitivity.

3. Nerve Damage: When the Pain Changes or Disappears

One of the more confusing things about toothache is that pain can change or even disappear while the problem remains.
If the dental pulp becomes severely damaged or dies, the tooth may stop responding to temperature or other stimuli. However, bacteria can still cause infection around the root.

Possible signs include:

• A tooth that previously hurt but no longer reacts.
• Pain when biting down.
• Swelling around the tooth.
• A darkening or discolouration of the tooth.

Sometimes the disappearance of pain is not the good news it appears to be.

An examination can help determine whether the pulp is healthy, damaged or infected.

4. Tooth Sensitivity: Why Cold Drinks Make Your Teeth Hurt

Does a cold drink send a sudden sting through your tooth?

Sensitivity often occurs when the dentine beneath the enamel becomes exposed. This can happen because of enamel wear, gum recession or other dental problems.

Common triggers include:

• Cold drinks and food.
• Hot beverages.
• Sweet or acidic foods.
• Cold air.
• Brushing your teeth.

Sensitivity often causes brief pain that disappears once the trigger is removed. However, persistent or localised sensitivity can also indicate decay or a cracked tooth.

Don't assume every sensitive tooth is harmless.

5. Cracked Teeth: When Biting Down Causes Sharp Pain

A tooth can look completely normal and still have a crack.

Small fractures may cause pain when chewing, particularly when biting pressure is released. You might also notice sensitivity to cold or discomfort that comes and goes.

Cracks can develop from biting hard foods, injuries, large fillings or repeated pressure from grinding.

The difficulty is that some cracks are too small to identify by simply looking at the tooth.

A dentist can assess the damage and determine whether the tooth needs restoration or further treatment.

6. Gum Problems and Dental Infections

Sometimes the source of tooth pain isn't the tooth itself.

Inflamed gums can become red, swollen and tender. More serious infections, including dental abscesses, can cause:

• Persistent, throbbing pain.
• Swelling around the tooth or face.
• Pain when chewing.
• An unpleasant taste in the mouth.
• Fever or general discomfort.

A dental abscess requires urgent dental treatment. It won't disappear simply because the pain becomes manageable.
If you experience difficulty breathing, swallowing or speaking, seek emergency medical attention.

7. Teeth Grinding: The Hidden Pressure Behind Tooth Pain

You might be damaging your teeth while you sleep without even knowing it.

Grinding and clenching place repeated pressure on the teeth and jaw. Over time, this can wear down enamel, cause sensitivity and strain the surrounding muscles.

You may notice:

• Sensitive or aching teeth.
• A sore jaw when waking up.
• Headaches, particularly in the morning.
• Worn or chipped teeth.

A dentist can identify signs of grinding and recommend ways to protect your teeth.

8. Other Possible Causes of Tooth Pain

Not every toothache originates from decay or infection.

Dental trauma, wisdom tooth problems, inflammation around the root and even referred pain from nearby structures can produce discomfort that feels like it's coming from a particular tooth.

In some cases, sinus problems can cause pain around the upper back teeth. Jaw disorders can also create discomfort that resembles toothache.

This is why the location of the pain alone doesn't always reveal its source.

How to Tell What's Causing Your Toothache

The way your tooth hurts can offer useful clues, but symptoms often overlap.


These are possibilities, not a diagnosis. A dentist may need to examine the tooth and take an X-ray or perform additional tests to identify the actual cause.

When Should You Get Your Tooth Checked?

The best time to identify a dental problem is before it starts hurting. The second-best time is now.

Arrange a dental examination if your toothache lasts more than two days, keeps returning, becomes worse or causes pain when biting.

Swelling, fever, an unpleasant taste or signs of infection need prompt dental attention. If you have difficulty breathing, swallowing or speaking, seek emergency medical help.

Even if the pain disappears, the underlying problem may still need treatment.

Find Out What's Really Causing Your Tooth Pain at Maxilla Dental Clinic

A toothache can have several causes, and the same symptoms can point to very different problems.

At Maxilla Dental Clinic in central Riga, an examination can help identify what's happening beneath the surface, from tooth decay and damaged dental pulp to cracks and infections.

With more than 20 years of experience, the clinic offers treatments including fillings and microscope-assisted root canal procedures.
You don't need to work out what's wrong yourself. Start with an examination, understand what's happening and find out what can be done.

Your tooth is giving you a warning. Find out what it's trying to tell you.

Book an appointment at Maxilla Dental Clinic.

Frequently Asked Questions

Why does my tooth hurt for no apparent reason?

Tooth pain can start without an obvious trigger because of decay, inflammation inside the tooth, cracks or infection. Some problems develop beneath the surface before becoming noticeable.

Why does my tooth hurt when I bite down?

Pain when biting can indicate a cracked tooth, damaged filling or inflammation around the root. A dental examination can help identify the cause.

Why does my tooth hurt when I drink cold water?

Cold sensitivity can occur when dentine becomes exposed, but cavities and cracks can produce similar symptoms. Pain that lingers after drinking should be checked.

Can a tooth hurt without having a cavity?

Yes. Gum problems, cracked teeth, pulp inflammation, grinding and referred pain can all cause toothache without a visible cavity.

Why does my tooth stop hurting suddenly?

Severe damage to the dental pulp can sometimes cause the nerve to stop responding. The pain may disappear even though infection or damage remains.

Can stress cause toothache?

Stress can contribute to teeth grinding and clenching, which may cause tooth sensitivity, jaw pain and headaches.

How does a dentist find the cause of toothache?

A dentist examines the teeth and gums, asks about your symptoms and may use X-rays or other diagnostic tests to identify decay, cracks, inflammation or infection.

When does toothache require root canal treatment?

Root canal treatment may be recommended when the dental pulp is irreversibly inflamed or infected. The procedure removes the affected tissue and helps preserve the remaining tooth.