Swollen Gums: Causes, Symptoms and How to Treat Them

Swollen gums are one of the most common reasons patients come in between regular check-ups. The swelling can be localised to one tooth or spread across a larger area, and the cause can range from something minor and easily resolved to something that requires prompt attention.

Here’s what’s behind it, when it’s urgent, and what treatment involves.

What Does It Mean When Gums Are Swollen?

Swollen gums are a sign of inflammation in the gum tissue. The body is responding to something — bacteria, injury, infection, or irritation — and the tissue becomes red, puffy, and often tender to touch or pressure.

Swelling can be localised, affecting the gum around a single tooth, or generalised, spreading across a wider area of the mouth. Localised swelling usually points to a specific cause at that site — an abscess, a trapped piece of food, or an issue with a nearby tooth or restoration.

Generalised swelling is more commonly associated with gum disease or systemic factors such as hormonal changes.

In either case, swollen gums are a symptom worth investigating rather than waiting out.

Common Causes

Gingivitis

The most frequent cause of swollen gums. Plaque buildup along the gumline triggers inflammation — the gums become red, swollen, and bleed easily. Gingivitis can usually be reversed with good brushing, flossing, and a professional clean. If it isn’t treated, it can turn into periodontitis.

Plaque and tartar buildup

Even without clinical gingivitis, accumulated plaque and hardened tartar irritate the gum tissue. A professional scale and clean is the only way to remove tartar once it has formed — brushing and flossing alone won’t shift it.

Tooth abscess

An infection around the root of a tooth can lead to swelling, which may become quite severe. The gum may look raised or have a pimple-like bump. An abscess won’t go away by itself. If it’s left untreated, the infection can spread, so it’s important to see a dentist as soon as possible.

Gum disease

Advanced gum disease — periodontitis — involves deeper infection below the gumline. If you have gum recession, you may also notice bad breath, swollen or bleeding gums, or even loose teeth. Periodontal treatment is required; home care alone won’t address it at this stage.

Wisdom teeth

Partially erupted wisdom teeth create a gum flap that traps food and bacteria, leading to localised swelling and pain — a condition called pericoronitis. The swelling can become significant and recurs until the underlying issue is addressed.

Ill-fitting dental work

A crown, filling, or denture that doesn’t fit properly can chronically irritate the surrounding gum tissue, causing localised swelling at the point of contact. Adjusting or replacing the restoration resolves it.

Hormonal changes

Pregnancy, puberty, and menopause all increase gum sensitivity and susceptibility to inflammation. Pregnancy gingivitis — swollen, bleeding gums during pregnancy — is common and worth managing with professional support during prenatal care.

When Swollen Gums Are Urgent

Most causes of swollen gums can be assessed at a scheduled appointment. Seek same-day care if:

• Swelling is spreading to the jaw, cheek, or neck
• There is fever, or you feel generally unwell
• You find it difficult to swallow or open your mouth.
• Severe pain that isn’t controlled with over-the-counter pain relief.
• There is visible pus or a rapidly enlarging lump in the gum.

If swelling is affecting the airway or ability to swallow, go directly to an emergency department — this is a medical emergency.

Home Care

Home care reduces discomfort and supports healing, but it doesn’t address the underlying cause if a structural or infectious issue is driving the swelling.

Gentle brushing

Continue brushing, but use a soft-bristled toothbrush and avoid scrubbing the inflamed area. Stopping brushing altogether allows more plaque to accumulate, worsening inflammation.

Saltwater rinse

Rinse with warm water and dissolve ½ teaspoon of salt in water, then repeat 2 – 3 times daily for 30 – 60 seconds. Reduces bacterial load and soothes inflamed tissue without further irritation.

Avoid irritants

Alcohol-based mouthwashes, spicy foods, and smoking all aggravate inflamed gum tissue. Avoid them until the swelling has settled.

What doesn’t help

Ignoring it and hoping it resolves. Swelling that comes and goes doesn’t mean the problem is intermittent — it usually means the underlying cause is still present.

Professional Treatment Options

Treatment depends on the cause identified during assessment.

Scale and clean

For swelling caused by plaque, tartar, or gingivitis, a professional dental cleaning removes the bacterial deposits that cause the inflammation. For most patients with early gum disease, this is the primary treatment — the gums settle once the irritant is removed.

Periodontal treatment

When gum disease has progressed below the gumline, scaling and root planing clean the root surfaces and remove bacteria from the gum pockets. This is done in sections, often over multiple appointments, and may be carried out under local anaesthetic.

Antibiotics

Where a tooth abscess or spreading infection is present, antibiotics are prescribed to manage the acute phase before definitive treatment. They reduce the infection but don’t eliminate the source — the tooth still needs to be treated.

Extraction

If a wisdom tooth, severely decayed tooth, or tooth with a non-resolvable abscess is the cause, extraction removes the source of infection and allows the surrounding tissue to heal. This is the definitive solution when the tooth can’t be saved or is causing recurrent problems.

Frequently Asked Questions

Can swollen gums naturally go away?

Mild swelling from minor irritation — a piece of food caught under the gum, a small abrasion — can settle with improved home care. Swelling caused by infection, gum disease, or an abscess won’t resolve without professional treatment. If swelling persists beyond a few days or keeps coming back, it needs to be assessed.

Why is only the gum around one tooth swollen?

Localised swelling usually indicates a specific cause at that site — a tooth abscess, a crack in the tooth, trapped food debris, or an issue with a nearby filling or crown. It’s worth having a single swollen area assessed rather than assuming it will settle, particularly if it’s accompanied by sensitivity or pain.

Is it normal for gums to swell after dental work?

Some swelling after fillings, extractions, or scaling is normal and settles within a few days. If swelling is increasing rather than decreasing after the first 48 hours, or is accompanied by fever or significant pain, contact the practice — it may indicate an infection developing at the site.

Can hormonal changes cause swollen gums?

Yes. Pregnancy, puberty, and menopause all increase gum susceptibility to inflammation. Pregnancy gingivitis is particularly common — the gums become more reactive to plaque during pregnancy. Maintaining good home care and attending regular dental check-ups during pregnancy helps manage it.

How long does it take for swollen gums to heal after treatment?

For gingivitis treated with a scale and clean, most patients see noticeable improvement within 1 to 2 weeks when home care improves. For more significant infections or periodontal treatment, the timeline is longer — several weeks to months depending on severity. Your Campbelltown dentist will give you a specific expectation based on what’s found during assessment.

Swollen Gums Treatments in Campbelltown

If your gums are swollen, tender, or have been bothering you for more than a few days, get it checked.

Our dental team at Marketfair Dental Care provides safe and effective gum treatments for everyone in Campbelltown and the surrounding communities.

Call us on (02) 4620 0800 or book online.

Visit us at Marketfair Campbelltown, Shop 21B, 4 Tindall St, Campbelltown. We see patients from Campbelltown, Rosemeadow, Ambarvale, Glen Alpine, and Narellan.