Why Is My Gum Swollen Around One Tooth In The Back?

BY Dr. McDowell  |  
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Dr. McDowell
Dr. McDowell has always been focused on using the latest technology to improve the patient experience. From radiation-free imaging to laser dentistry, he has always been ahead of the curve and is dedicated to improving the practice of dentistry one ..

Do you feel discomfort or notice swelling around just one tooth in the back of your mouth? Why is my gum swollen around one tooth in the back? It’s not uncommon, but it can be concerning. Whether it’s tenderness, redness, or puffiness, swollen gums are usually your body’s way of signaling that something isn’t quite right. This blog will help you understand the possible causes, but if the issue persists or worsens, it’s always best to seek advice from a dental professional. Here’s what we’ll cover:

🦷 Possible Causes of a Swollen Gum Around One Tooth

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Swelling in a specific area around one tooth is often tied to localized issues. Below, we’ll explore the most common reasons in detail.

Gum disease, including gingivitis and periodontitis, is a common cause of dental problems. Gingivitis results from plaque buildup, leading to swollen, red gums. If left untreated, it can progress to periodontitis, which causes gum recession, loose teeth, and even tooth loss.

Food particles stuck near the tooth, such as popcorn kernels, can also lead to irritation. Trapped food can cause swelling, soreness, and even infection if not removed promptly.

An abscessed tooth is a more serious issue, often caused by untreated cavities, gum disease, or injury. This condition can lead to intense pain, swelling, sensitivity, and, in severe cases, fever.

Key symptoms to watch for include red, swollen gums, persistent bad breath, gum tenderness, throbbing pain, or drainage near the tooth. These signs may indicate a problem that needs professional attention.

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Steps to Address Swollen Gums

If you’re dealing with swollen gums around one tooth, here’s what you can do:

🪥 5 Reasons Your Gum Might Be Swollen Near One Tooth

Close-up of a person's open mouth showing a swollen, red gum area around a missing tooth. The person is using a finger to pull back their cheek to reveal the gum.

Swollen gums around one tooth can signal underlying dental issues like infections or injuries. Identifying the cause early is key to preventing further complications.

1. Poor Oral Hygiene

Neglecting proper oral care, such as skipping brushing or flossing, allows plaque to build up on your teeth. Plaque is a sticky film of bacteria that forms when food particles, saliva, and bacteria mix. If not removed, plaque hardens into tartar, which is even harder to clean and more damaging to your gums. This buildup can irritate your gums, causing redness, swelling, and even bleeding—a condition known as gingivitis. Left untreated, gingivitis can progress into more serious gum disease, known as periodontitis, which can lead to gum recession, tooth loss, and even affect your overall health. Maintaining a consistent oral hygiene routine, including twice-daily brushing, daily flossing, and regular dental checkups, is crucial for preventing these issues and keeping both your teeth and gums healthy.

2. Tooth Decay

Cavities, especially those near the gumline, can cause infections that lead to swollen, painful gums around the affected tooth. This occurs when bacteria break down the tooth enamel and penetrate deeper layers of the tooth, eventually reaching the nerve and surrounding gum tissue. The resulting irritation can cause significant pain, swelling, and discomfort. If left untreated, tooth decay can progress into more severe conditions, such as abscesses—painful pockets of pus caused by infection—or even systemic infections that spread beyond the mouth. Addressing cavities early through fillings or other dental treatments is essential to prevent these complications. Maintaining a healthy diet, limiting sugary foods and drinks, and practicing good oral hygiene can help protect your teeth from decay in the first place.

3. Impacted Wisdom Teeth

Wisdom teeth, or third molars, often don’t emerge fully or grow in at awkward angles, leading to a condition known as impaction. Impacted wisdom teeth can create small pockets between the tooth and gums where bacteria, food particles, and debris accumulate. Over time, this can lead to infections, gum swelling, and inflammation in the surrounding area. The pain caused by impacted wisdom teeth is often felt when chewing or touching the affected area. If not addressed, impacted wisdom teeth can lead to more severe complications, including cyst formation, gum disease, or damage to neighboring teeth. In many cases, extraction of the impacted wisdom teeth is necessary to prevent these issues. Regular dental checkups can help monitor wisdom tooth development and identify potential problems early.

4. Orthodontic Irritation

Orthodontic devices, like braces, retainers, or clear aligners, are invaluable for correcting dental alignment but can sometimes irritate the gums. Wires, brackets, or edges of these devices may rub against the soft tissue of your mouth, causing localized swelling, redness, or soreness in the gums. This irritation is especially common during the adjustment period after a new device is fitted or tightened. However, it can be managed with a few simple strategies. Applying orthodontic wax to sharp edges, rinsing with warm salt water, and maintaining good oral hygiene can help soothe the irritation and prevent further discomfort. Be sure to follow your orthodontist’s care instructions and notify them if the irritation persists, as they may adjust the device to better fit your mouth.

5. Sinus Infection

It might seem surprising, but sinus infections can sometimes lead to gum problems. When your sinuses become inflamed or infected, the pressure from the swollen sinus cavities can extend to the upper jaw. This often causes gum swelling or tenderness near specific teeth, usually in the upper molar area. In some cases, the discomfort may be mistaken for a toothache or dental issue when the real culprit is the sinus infection. Common symptoms associated with sinus-related gum discomfort include nasal congestion, facial pain or pressure, headaches, and postnasal drip. Treating the sinus infection with decongestants, saline sprays, or antibiotics (if bacterial) typically resolves the gum discomfort as well. If the symptoms persist or worsen, consult both a dentist and a healthcare provider to determine the best course of action.

👉 How to Relieve Swollen Gums at Home

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While professional care is essential, some home remedies can offer temporary relief.

Warm Saltwater Rinse

Mix half a teaspoon of salt into a glass of warm water and stir until fully dissolved. Swish the solution around your mouth for about 30 seconds, focusing on the affected area, then spit it out. Repeat this process 2-3 times a day for effective results. Saltwater works as a natural disinfectant, helping to reduce bacteria in the mouth while soothing inflamed or swollen gums. It can also promote faster healing of minor wounds and irritated tissue in the mouth. Avoid using hot water, as it can be uncomfortable, and ensure the salt concentration isn’t too high, as it might dry out the oral tissues.

Over-the-Counter Pain Relief

Over-the-counter medications, such as ibuprofen or acetaminophen, can provide effective relief from pain and discomfort associated with gum or tooth issues. These medications not only help alleviate discomfort but also reduce inflammation and swelling. Additionally, numbing gels and oral anesthetics containing benzocaine can offer immediate, localized pain relief. Apply the gel directly to the affected area using a clean finger or cotton swab, but be cautious about overusing these products, as prolonged use can lead to irritation or other complications. Always follow the dosage instructions on the package, and consult a healthcare professional if you’re unsure of the right product for your situation.

Improved Oral Hygiene

Maintaining proper oral hygiene is crucial for managing gum or tooth pain. Use a soft-bristled toothbrush to gently clean your teeth, paying special attention to avoid irritating the painful area. Brush twice a day using a fluoride toothpaste, and follow up with flossing to remove food particles and plaque buildup around the affected tooth or gum. Be careful not to floss too aggressively, as this can worsen irritation. An alcohol-free mouthwash can also be helpful for keeping the area clean and reducing bacteria. By improving your oral hygiene routine, you can help prevent further irritation and promote healing over time.

Cold Compress

If you’re experiencing swelling or significant discomfort, a cold compress can provide quick relief. Wrap a few ice cubes or a cold gel pack in a clean cloth and apply it to the outside of your cheek, near the affected area. Hold the compress in place for 15-20 minutes, then remove it for at least 20 minutes before reapplying if needed. The cold will help reduce swelling, numb the area, and minimize pain signals from reaching your brain. Avoid applying ice directly to the skin, as this can cause irritation or damage. Using a cold compress is especially effective for temporary relief and can be repeated several times a day as required.

However, it’s important to remember that these methods are only temporary solutions for managing gum or tooth pain. If the pain persists or worsens, it’s essential to seek professional dental care to address the root cause of the problem and prevent further complications.

👩🏻‍⚕️ Swollen Gum Care

At Wayzata Dental, we understand how uncomfortable and concerning swollen gums can be, especially when they affect only one area. Our dedicated team combines advanced technology with compassionate care to address the root cause of your dental issues while ensuring your comfort every step of the way.

Whether you need laser treatment, preventative care, or restorative procedures, we’re here to help you achieve optimal oral health and a confident smile. Don’t let gum discomfort go untreated—schedule your appointment with Wayzata Dental today and experience the difference of personalized, minimally invasive care. Your smile deserves the best!

Dr. McDowell
Dr. McDowell has always been focused on using the latest technology to improve the patient experience. From radiation-free imaging to laser dentistry, he has always been ahead of the curve and is dedicated to improving the practice of dentistry one ..