Why Do My Teeth Hurt When I Have a Cold? Explained by Dentist

When you have a cold, the congestion, the sore throat, and the weariness can take a toll on you. The last thing you need is a throbbing pain in your upper teeth. But that happens more often than you think.

At Lynnwood Dental Studio, many of our patients ask, “why do my teeth hurt when I have a cold?” Well, in most cases, there’s nothing wrong with your teeth. The pain is often caused by inflamed sinuses putting pressure on the roots of your upper molars.

In this in-depth guide, you’ll learn everything about the anatomical connection between your sinuses and tooth pain, how to know if a pain is cold-related or a dental emergency, and what to do next.

Why Your Teeth Hurt When You Have a Cold: The Sinus Connection

There are four pairs of sinuses in your skull, of which the maxillary sinuses are the largest. They are located right above your upper jaw, behind your cheekbones.

This proximity causes the roots of your upper teeth (specifically your molars) to almost touch the floor of the maxillary sinus. In some people, these roots even extend to the sinus cavity.

What happens when you have a cold

1. Inflammation: The viral infection leads to inflammation of the lining of your sinuses.

2. Fluid Accumulation: blocked or narrowed nasal passages cause mucus buildup in the cavities.

3. Compression: The inflamed, mucus-filled sinuses push down onto the roots of your upper teeth or molars.

This is why your upper teeth or gums may ache when you have a cold. This condition is called Sinusitis.

Sinusitis vs. Real Dental Pain

Distinguishing between sinus-led pain and true dental pain is crucial for identifying the right way to get relief. Here is how you can check whether the pain is caused by sinus inflammation:

Signs of Sinus-Related Tooth Pain

• Multiple Upper Teeth Affected: Usually, sinus pressure causes several upper teeth to ache simultaneously, rather than a specific tooth or area.

• Positional Changes: The pain may intensify when you jump or move forward. This is because gravity increases the sinus pressure, leading to sharper tooth pain.

• Lack of Sensitivity to Temperature: Sinus pain may make your teeth or gums insensitive to cold water or hot coffee.

• Upper Jaw Only: The pain rarely happens in the lower teeth.

Other than the above, general cold symptoms, including nasal congestion (difficulty breathing through the nose), reduced sense of smell, thick mucus, ear pressure, and headaches (specifically behind the eyes or in the forehead), also indicate that the pain is almost certainly related to sinuses.

Signs of a True Dental Issue

• Localized Pain: The pain is often limited to a particular tooth or spot.

• Gum Swelling: If it’s an infection, you’ll likely see a pimple or swelling on the gums.

• Lingering Sensitivity: Sharp pain when or after eating something sweet, cold, or hot.

• Lower Tooth Pain: If the pain is in your bottom teeth, it is usually not linked to your sinuses.

How to Manage Sinus-Related Tooth Pain at Home

Once you’ve determined that the toothache is linked to your cold, reducing inflammation and congestion can help find relief. Here are a few things you can try at home:

Hydration: Drink plenty of warm water. It keeps mucus thin and moving, preventing the blockage and reducing inflammation.

Steam Inhalation: Using a humidifier or taking a hot shower may open up nasal passages.

Saline Rinses: Using saline sprays can clear out blockage and reduce swelling.

Warm Compresses: Applying hot compresses to the cheekbones can ease the pain.

OTC Decongestants: Cold medications can reduce swelling.

When Should You See a Dentist?

While many cold-related toothaches subside once the infection clears, see your dentist immediately if there’s sharp, persistent pain, especially after your cold symptoms are gone.

If the pain is affecting your sleep or daily routine, it is time to book a professional dental appointment.

At Lynnwood Dental Studio, we strongly advise visiting us if the pain doesn’t fade even after the cold is gone. We use high-resolution digital imaging or X-rays to find out the exact issue. If the problem is sinus-related while the tooth or root is healthy, we refer you to a physician. However, if we notice an infection or a deep cavity, we can recommend the right treatment.

Can a Tooth Infection Cause a Sinus Infection?

Yes. While viruses like the common cold are the primary cause of a sinus infection, few people know that a tooth infection can also lead to sinus inflammation. This is called Maxillary Sinusitis of Dental Origin (MSDO).

A chronic infection at the tip of an upper tooth root can occasionally penetrate the bone and infect the sinus. This type of sinus infection is usually one-sided and recurring. If that’s the case with you, see your dentist immediately.

Preventive Dental Care: How A Healthy Smile Can Protect You From Pain

A cold is less likely to cause tooth pain if you have a strong dental foundation. 

• Regular professional cleanings remove tartar and prevent gum inflammation, making gums stronger.

• If you grind your teeth (bruxism), use night guards to protect your nerves.

• Never miss routine dental checkups. Catching and treating a small issue early can prevent a painful and expensive treatment later.

Why Choose Lynnwood Dental Studio?

At Lynnwood Dental Studio, we understand how your dental health can affect your overall well-being. Our expert dentists use state-of-the-art diagnostic technologies to quickly and accurately detect issues early, ensuring timely treatment to restore your beautiful smile.

We pride ourselves on our gentle, patient-focused team committed to protecting your teeth and applying the best tooth pain treatment tailored to your condition and preferences.

Conclusion

A toothache may or may not be cold-related. The key is to look for the signs. If you have pain only in upper teeth, particularly back molars, which increases as you jump or bow down, it may be related to a sinus infection. Wait for the cold to clear up. Hydrate with warm water, take hot showers, rest up, and apply hot compressions.

If the tooth pain persists or starts affecting your sleep or eating, it may be time to see a dentist. Contact Lynnwood Dental Studio today to schedule an appointment. Our team will help you determine if it’s just a cold-related ache or something that needs professional attention.