Swollen gums are almost always a sign of inflammation, and the fix depends on what’s driving it. In most cases, bacterial plaque buildup is the culprit, and a combination of better cleaning habits and targeted home care can bring the swelling down within one to two weeks. More stubborn or severe swelling may need professional treatment.
What’s Causing the Swelling
The most common reason gums swell is gingivitis, the earliest stage of gum disease. When plaque (a sticky film of bacteria) isn’t removed daily, it hardens into tartar, which irritates the gum tissue and triggers inflammation. At this stage, the damage is reversible. Left untreated, gingivitis can progress to periodontitis, a deeper infection that damages the bone and tissue supporting your teeth.
Several factors raise your risk beyond brushing habits. Smoking is the single most significant risk factor for gum disease and also makes treatment less effective. Hormonal shifts during pregnancy, diabetes, and certain medications that reduce saliva flow can all make gums more prone to swelling. Sometimes a single tooth is the problem: food trapped under the gumline, a poorly fitting crown, or an emerging wisdom tooth can cause localized swelling that feels different from the widespread puffiness of gingivitis.
Home Remedies That Reduce Swelling
A warm saltwater rinse is the simplest and most reliable first step. Dissolve half a teaspoon of salt in a cup of warm water and swish it gently around your mouth for about 30 seconds. Salt draws fluid out of swollen tissue and creates an environment that’s harder for bacteria to thrive in. You can repeat this two to three times a day.
A diluted hydrogen peroxide rinse is another option. Mix equal parts standard 3% hydrogen peroxide (the brown bottle from the drugstore) with water, creating a 1.5% solution. Swish for 30 seconds and spit it out completely. This helps kill bacteria in areas your toothbrush can’t easily reach. Don’t swallow it, and don’t use it more than a couple of times per day.
Applying a cold compress to the outside of your cheek near the swollen area can help with pain and bring down inflammation temporarily, especially if the swelling came on suddenly after an injury or procedure.
Choosing the Right Pain Reliever
If your swollen gums are painful, reach for ibuprofen or naproxen rather than acetaminophen. The American Dental Association recommends anti-inflammatory pain relievers as first-line therapy for dental pain because they reduce inflammation at the site where it’s happening. Acetaminophen blocks pain signals in the brain but does nothing about the inflammation itself. For swollen gums specifically, reducing the inflammation is the whole point.
Improving Your Daily Cleaning Routine
The swelling won’t stay away unless you address what caused it. Brush twice a day with a soft-bristled toothbrush, angling the bristles toward the gumline at about 45 degrees. Hard-bristled brushes or aggressive scrubbing can actually make irritated gums worse.
Cleaning between your teeth daily matters just as much as brushing. If you’ve only ever used string floss, consider trying interdental brushes (the small bristled picks that slide between teeth). A 2019 Cochrane review found that interdental brushes tend to improve gum health slightly more than floss, with more consistent reductions in gum inflammation. A separate meta-analysis ranked interdental brushes as the most effective option for reducing gum inflammation scores, while floss ranked near the bottom. The caveat: interdental brushes need enough space between teeth to fit comfortably. For very tight contacts, floss is still the better tool. Many people benefit from using both.
When You Need Professional Treatment
If your gums are still swollen after two weeks of diligent home care, you likely have tartar buildup that only a dental professional can remove. A standard cleaning handles tartar above the gumline, but if the infection has crept deeper, your dentist may recommend scaling and root planing, often called a “deep cleaning.” This procedure removes plaque and tartar from below the gumline, then smooths the tooth root surfaces so gums can reattach more tightly.
After a deep cleaning, your teeth might feel slightly loose for a short period. This resolves as the gums tighten back up. You may also notice your gums look like they’ve receded, but that’s mostly because the swelling has finally gone down, revealing where the tissue actually sits.
For persistent gum disease, your dentist might prescribe an antiseptic mouthwash. The standard prescription version contains 0.12% chlorhexidine and is used twice daily, 15 ml at a time, swished for 30 seconds after brushing. It’s effective but can stain teeth with long-term use, so it’s typically prescribed for a limited period.
Swollen Gums During Pregnancy
Pregnancy gingivitis is extremely common and has a straightforward explanation: rising levels of estrogen and progesterone increase blood flow to the gums, making them more sensitive to plaque and more prone to swelling and bleeding. The swelling typically appears in the second trimester and resolves after delivery.
The main treatment is a professional cleaning to remove plaque buildup, combined with consistent home care. Dentists often recommend a slightly stronger saltwater rinse during pregnancy (1 teaspoon of salt per cup of warm water) and an alcohol-free mouthwash. If symptoms are severe, antibiotics or a prescription mouthwash may be necessary, but any medication should be cleared with your pregnancy care provider first.
Nutritional Gaps That Affect Your Gums
Vitamin C plays a direct role in gum health. Your body needs it to maintain and repair the connective tissue in your gums, and low intake is linked to increased bleeding and swelling. The recommended daily intake for adult men is 90 mg, and for women it’s 75 mg, but Harvard Health suggests aiming for 100 to 200 mg daily through foods like bell peppers, kiwi, oranges, and kale, or through a supplement. True scurvy is rare in developed countries, but marginally low vitamin C levels are common enough to contribute to gum problems.
Signs of Something More Serious
Not all gum swelling is routine gingivitis. A periodontal abscess is a pocket of pus that forms in the gum tissue, and it typically shows up as a distinct swollen bump rather than general puffiness. Other signs include a persistent bad taste, pain while chewing, sensitivity to hot or cold, loose teeth, or swollen lymph nodes in your neck or jaw.
If you develop a fever, chills, nausea, difficulty breathing or swallowing, or pain that doesn’t respond to over-the-counter pain relievers, the infection may be spreading. That warrants emergency care, not a wait-and-see approach.