A swollen gum usually signals that bacteria are irritating the tissue around one or more teeth. The fastest way to bring down mild swelling at home is a warm saltwater rinse, gentle but thorough cleaning around the affected area, and an over-the-counter anti-inflammatory like ibuprofen. If the swelling is severe, spreading to your face or neck, or accompanied by fever, you need professional care right away.
Why Your Gum Is Swollen
The most common cause is plaque buildup. Plaque is a sticky, colorless film of bacteria that forms on your teeth after eating, especially after sugary or starchy foods. When plaque sits on your teeth for more than a day or two, it hardens into tartar along and under the gumline. Tartar acts like a shield for bacteria and directly irritates the surrounding gum tissue, causing it to swell and bleed easily. This is gingivitis, and it affects nearly half of adults at some point.
Left untreated, gingivitis can progress to periodontitis, a deeper infection that damages the bone supporting your teeth and can eventually lead to tooth loss. But swollen gums don’t always mean gingivitis. A localized bump or swelling near a single tooth may point to a dental abscess, which is a pocket of infection. Hormonal shifts during pregnancy can also trigger gum swelling, as rising estrogen and progesterone levels increase blood flow to gum tissue and promote the growth of certain oral bacteria. By the third trimester, these hormones reach 10 to 30 times their normal levels, which is why pregnancy gingivitis is so common.
Vitamin C deficiency is another overlooked cause. When your body doesn’t get enough vitamin C, it can’t properly build collagen, the protein that holds gum tissue together. This leads to fragile blood vessels in the gums, resulting in swelling, bleeding, and pain. It’s rare in developed countries but worth considering if your diet is very limited.
Saltwater Rinse: Your Best First Step
A simple saltwater rinse reduces bacteria and draws fluid out of swollen tissue. Mix about one teaspoon (5 grams) of table salt into one cup (250 mL) of warm water. Swish it gently around the affected area for about two minutes, then spit. Do this three times a day. The concentration is mild enough to use consistently without irritating your gums further, and research on gum cells shows saline at this ratio supports tissue healing.
Don’t use rinses that contain alcohol, as they can dry out and further irritate inflamed tissue. If you want something stronger than salt water, antimicrobial mouthrinses containing chlorhexidine are available by prescription. These are effective at reducing gum inflammation when used twice daily for 30 to 60 seconds, but they’re meant for short-term use only. Side effects like tooth staining and taste changes make them impractical for everyday use.
Reduce Pain and Swelling Quickly
Ibuprofen works well for gum swelling because it targets both pain and inflammation at the source. Standard over-the-counter dosing (200 to 400 mg every 4 to 6 hours as needed) is usually enough for mild to moderate cases. Research on dental inflammation shows that consistent use over two to three days is more effective at reducing tissue swelling than taking it only when pain flares up.
For visible facial swelling near the jaw, apply a cold pack to the outside of your cheek for 10 to 20 minutes at a time, with a thin cloth between the ice and your skin. This constricts blood vessels and slows the inflammatory response. Repeat as needed throughout the day, giving your skin a break between sessions.
Clean the Area Thoroughly but Gently
It’s tempting to avoid brushing a swollen, tender spot, but that lets more bacteria accumulate and makes things worse. Use a soft-bristled toothbrush and brush gently along the gumline where the swelling is. Angle the bristles at about 45 degrees toward the gum so they sweep underneath the edge of the tissue where plaque collects.
Cleaning between teeth matters just as much. A meta-analysis found that adding interdental cleaning to regular brushing reduced gingivitis by 34% and plaque scores by 32% compared to brushing alone. Interdental brushes (the tiny bottle-brush-shaped picks) tend to be easier to use and more effective than traditional floss for most people, especially in areas where teeth have gaps. If your teeth are tightly spaced, regular floss or a water flosser works fine. The key is getting something between the teeth at the swollen site at least once a day.
When Home Care Isn’t Enough
If your gum swelling hasn’t improved after a week of diligent home care, or if it keeps coming back in the same spot, you likely need professional cleaning. Once tartar has hardened onto your teeth, no amount of brushing or rinsing will remove it. A dentist or hygienist can perform scaling and root planing, which is essentially a deep cleaning below the gumline. The procedure scrapes away tartar from tooth roots and smooths the root surface so gums can reattach. In clinical studies, this approach improved gum health and reduced pocket depth in about 85% of treated sites.
The procedure is done under local anesthesia, so you won’t feel it during treatment. Afterward, expect some soreness and sensitivity for a few days. Your gums may feel tighter against your teeth within a couple of weeks as the inflammation resolves. Most people need one to two sessions depending on how widespread the buildup is.
Signs You Need Urgent Care
Most gum swelling is a nuisance, not an emergency. But certain symptoms mean the infection may be spreading beyond the gum tissue and requires immediate attention:
- Fever combined with facial swelling. This suggests the infection has moved into deeper tissues of the jaw or neck.
- Difficulty breathing or swallowing. Swelling in the throat area from a dental infection can become dangerous quickly.
- Severe, constant, throbbing pain that radiates to your jaw, neck, or ear.
- A sudden rush of foul-tasting, salty fluid in your mouth, which means an abscess has ruptured. The pain may temporarily improve, but the infection still needs treatment.
- Swollen lymph nodes under your jaw or in your neck.
If you have fever and facial swelling and can’t reach a dentist, go to an emergency room. A spreading dental infection can become serious if it reaches the throat or bloodstream.
Preventing Swollen Gums From Returning
Gum swelling almost always comes back if the habits that caused it don’t change. Brush twice a day with a soft-bristled brush, spending at least two minutes and paying close attention to the gumline. Clean between your teeth once daily with floss or interdental brushes. These two habits alone eliminate the vast majority of plaque before it can harden into tartar.
If you’re pregnant, expect your gums to be more reactive to plaque than usual, and be extra consistent with cleaning. Pregnancy gingivitis typically resolves after delivery as hormone levels return to normal, but letting it go untreated during pregnancy can lead to deeper gum problems. Eating enough vitamin C through fruits and vegetables (citrus, bell peppers, strawberries, broccoli) supports the collagen your gums need to stay firm and resist infection. Regular dental cleanings every six months catch tartar buildup before it has a chance to cause swelling again.