What Are Swollen Gums and When Should You Be Concerned?
Swollen gums are puffy, red, or enlarged gum tissue that often feels tender to the touch. Healthy gums are typically firm, pale pink, and fit snugly around each tooth. [2] When gums swell, they may look shiny, feel soft, and bleed when you brush or floss.
Some gum swelling is mild and temporary. A small piece of food trapped under the gumline can cause irritation that resolves once the debris is removed. Hormonal changes during puberty, menstruation, or pregnancy can also produce short-term swelling that improves on its own.
Other times, swollen gums point to a deeper problem. Gum disease, infections, medication side effects, and systemic health conditions can all make gums swell. The key difference is how long the swelling lasts and what other symptoms come with it.
If your gums have been swollen for more than two weeks, if the swelling is spreading, or if you notice pus or a foul taste, something beyond simple irritation is likely going on. Those signs call for a professional evaluation.
Common Causes of Swollen Gums
Bacterial plaque is the leading cause of gum swelling, but it is not the only one. The causes range from preventable hygiene issues to medical conditions you may not connect to your mouth.
Gingivitis and Periodontitis (Gum Disease)
Gingivitis is the earliest stage of gum disease. It develops when bacterial plaque, a sticky film of bacteria, builds up along the gumline and triggers an inflammatory response. [1] The gums become red, swollen, and bleed easily during brushing or flossing. At this stage, no bone or tissue has been permanently damaged.
When gingivitis goes untreated, it can progress to periodontitis. In periodontitis, the inflammation extends below the gumline and begins to destroy the bone and connective tissue that hold teeth in place. [1] Pockets form between the teeth and gums, trapping more bacteria. The gums may swell further, recede, or pull away from the teeth.
According to the American Academy of Periodontology, gum disease is one of the most common inflammatory conditions affecting adults. [1] The good news is that gingivitis is reversible with improved oral hygiene and professional cleanings. Periodontitis, however, requires more involved treatment to manage.
Dental Abscess and Localized Infections
A dental abscess is a pocket of pus caused by a bacterial infection. It can form at the tip of a tooth root (periapical abscess) or in the gum tissue beside a tooth root (periodontal abscess). The affected area typically swells rapidly, throbs with pain, and may feel warm.
Abscesses can also develop around partially erupted wisdom teeth, a condition called pericoronitis. The gum flap covering the tooth traps food and bacteria, leading to painful swelling, difficulty opening the mouth, and sometimes fever.
Any abscess is a serious concern. Left untreated, the infection can spread to the jaw, head, neck, or even the bloodstream. If you notice a painful, localized swelling with pus drainage or a persistent bad taste, seek dental care promptly.
Medications That Cause Gum Overgrowth
Certain prescription drugs can cause a condition called gingival hyperplasia, meaning the gum tissue grows larger than normal. This overgrowth makes the gums look swollen, sometimes covering parts of the teeth.
Three categories of medication are most commonly linked to this side effect. Phenytoin, an anti-seizure drug, is a well-known cause. Cyclosporine, an immunosuppressant used after organ transplants, can also trigger overgrowth. Calcium channel blockers like nifedipine and amlodipine, prescribed for high blood pressure, round out the list. [2]
If you take any of these medications and notice your gums thickening, let both your dentist and prescribing physician know. In many cases, switching to a different medication can slow or stop the overgrowth. Strict oral hygiene and professional cleanings also help manage the condition.
Hormonal Changes and Pregnancy Gingivitis
Hormonal shifts during pregnancy, puberty, and menstruation increase blood flow to the gums and change how gum tissue responds to plaque. [2] Even with consistent brushing and flossing, the gums may become swollen, red, and prone to bleeding.
Pregnancy gingivitis is especially common during the second trimester. The elevated levels of progesterone make gum tissue more sensitive to the bacteria in plaque. In some cases, a localized growth called a pregnancy granuloma (also known as a pyogenic granuloma) can develop on the gums. These growths are not cancerous and often resolve after delivery.
Regular dental checkups during pregnancy are safe and recommended. Professional cleanings can help manage pregnancy gingivitis and prevent progression to more serious gum disease.
Vitamin Deficiencies
Vitamin C plays a critical role in maintaining healthy connective tissue, including gum tissue. A severe deficiency, known as scurvy, causes gums to swell, bleed, and turn a deep red or purple color. While full-blown scurvy is rare in developed countries, mild vitamin C deficiency can still contribute to gum problems.
Vitamin B deficiencies, particularly of folate and B12, can also affect oral tissues. Symptoms may include sore, swollen gums along with a smooth or burning tongue. A blood test can confirm whether a nutritional deficiency is contributing to your symptoms.
Other Possible Causes
Poorly fitting dentures, orthodontic appliances, or rough dental restorations can irritate gum tissue and cause localized swelling. Allergic reactions to toothpaste ingredients (such as sodium lauryl sulfate) or dental materials can also produce gum inflammation.
Less commonly, swollen gums can be a sign of systemic conditions like uncontrolled diabetes, leukemia, or autoimmune disorders. Diabetes, in particular, raises the risk of gum disease because high blood sugar impairs the body's ability to fight bacterial infections. [1] If gum swelling persists despite good oral hygiene and professional care, your dentist or periodontist may recommend medical testing.
When to See a Dentist or Periodontist for Swollen Gums
Mild gum swelling that lasts a day or two after flossing aggressively is usually not an emergency. Persistent or worsening symptoms, however, deserve professional attention.
Schedule a dental appointment if your gum swelling has lasted longer than two weeks, if your gums bleed every time you brush, or if you notice your gums pulling away from your teeth. These are signs that gum disease may be developing or progressing. [1]
Seek same-day or emergency care if you experience swollen gums along with fever, facial swelling, pus or drainage from the gums, severe pain, or difficulty swallowing or breathing. These symptoms can indicate an abscess or spreading infection that needs immediate treatment.
A periodontist is a dentist who has completed additional years of training focused on the gums, bone, and other structures that support the teeth. If your general dentist suspects moderate to advanced gum disease, they will often refer you to the periodontics page for specialized evaluation and care. [1]
How Dentists Diagnose the Cause of Swollen Gums
Diagnosing swollen gums starts with a visual exam and a few targeted measurements. Your dentist or periodontist will evaluate the color, texture, and shape of your gum tissue.
Periodontal probing is one of the most informative tests. The clinician uses a thin, graduated instrument to measure the depth of the space (called a sulcus or pocket) between each tooth and the surrounding gum. Healthy pockets are typically 1 to 3 millimeters deep. Depths of 4 millimeters or more suggest gum disease. [1]
Dental X-rays show the bone level around your teeth. Bone loss is a hallmark of periodontitis and helps distinguish it from gingivitis, where bone is still intact. In some cases, a full-mouth series of X-rays is needed to assess the extent of the damage.
Your dentist will also review your medical history, including current medications, recent hormonal changes, and any systemic conditions like diabetes. If a nutritional deficiency or blood disorder is suspected, a referral for blood work may follow. The goal is to identify not just the swelling itself but the specific underlying cause driving it.
Treatment Options for Swollen Gums
Treatment depends entirely on what is causing the swelling. Addressing the root cause is the only way to achieve lasting relief.
Improved Oral Hygiene for Mild Gingivitis
If the swelling is caused by early gingivitis, better daily hygiene is often enough to reverse it. Brush twice a day with a soft-bristled toothbrush, angling the bristles toward the gumline. Floss or use an interdental cleaner once daily to remove plaque from between teeth. [2]
An antimicrobial mouth rinse can help reduce bacteria in hard-to-reach areas. Look for products that carry the ADA Seal of Acceptance, which means they have been tested for safety and effectiveness. [2] With consistent home care, gingivitis-related swelling typically improves within one to two weeks.
Professional Cleanings and Scaling and Root Planing
When plaque hardens into tarite (calculus), it cannot be removed with a toothbrush alone. A professional dental cleaning removes calculus above and below the gumline.
For moderate to advanced gum disease, a deeper procedure called scaling and root planing (SRP) is typically recommended. During SRP, the clinician uses specialized instruments to remove bacterial deposits from the root surfaces of the teeth and smooth the roots so gum tissue can reattach. [1] This procedure is often performed under local anesthesia and may be completed over two or more visits.
Following SRP, many patients see a significant reduction in gum swelling, pocket depths, and bleeding. Maintenance cleanings, usually every three to four months, help prevent the disease from returning. [1]
Periodontal Surgery
When deep pockets persist after scaling and root planing, periodontal surgery may be needed. Flap surgery (also called pocket reduction surgery) involves lifting the gum tissue, cleaning the underlying bone, and repositioning the gums to reduce pocket depth. [1]
In cases of significant bone loss, bone grafts or guided tissue regeneration procedures can help rebuild lost support. For gum overgrowth caused by medications, a gingivectomy (surgical removal of excess gum tissue) may be performed to restore normal gum contours.
A periodontist will recommend surgery only when less invasive options have not achieved adequate results. The specific procedure depends on the severity and pattern of the disease.
Treating Infections and Abscesses
A dental abscess typically requires drainage. The dentist will make a small incision to allow the pus to escape, then clean the area thoroughly. Depending on the source of the infection, root canal treatment or tooth extraction may follow.
Antibiotics are sometimes prescribed to help control the infection, especially if there is facial swelling or fever. However, antibiotics alone do not cure a dental abscess. The source of the infection must be physically addressed.
Addressing Other Underlying Causes
If a medication is causing gum overgrowth, your dentist and physician may collaborate to find an alternative drug. Vitamin deficiencies are treated with dietary changes or supplements under medical guidance. Hormonal swelling during pregnancy is managed with professional cleanings and meticulous home care.
For patients with diabetes, controlling blood sugar is a critical part of gum disease management. Research shows a two-way relationship between diabetes and periodontitis: each condition can worsen the other. [1] Working with both your medical doctor and your periodontist gives you the best chance of managing both conditions effectively.
What Do Diagnosis and Treatment Cost?
Costs for diagnosing and treating swollen gums vary widely depending on the underlying cause and the treatment required. Costs vary by location, provider, and case complexity.
A routine dental exam and X-rays typically range from $50 to $350. A standard professional cleaning (prophylaxis) may cost $75 to $200. Scaling and root planing, which is a more involved procedure, generally ranges from $150 to $350 per quadrant (one-quarter of the mouth).
Periodontal surgery costs can range from $500 to $3,000 or more per area, depending on the type of procedure. Abscess drainage and related treatments like root canals also vary significantly in price.
Dental insurance often covers a portion of diagnostic exams, cleanings, and periodontal treatments, though coverage limits and copays differ between plans. Ask your dental office for a detailed estimate before treatment begins. Many offices also offer payment plans to help spread the cost over time.
Find a Periodontist Near You
If your gums have been swollen for more than two weeks, if you notice bleeding every time you brush, or if you have been told you have gum disease, a periodontist can provide specialized evaluation and treatment. Periodontists complete an additional three years of training beyond dental school, focusing specifically on the gums, bone, and supporting structures of the teeth. [1] Use our directory on the periodontics page to find a board-eligible or board-certified periodontist in your area.
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