Swollen gums are almost always caused by bacterial plaque building up where your teeth meet the gumline. The good news: if caught at the gingivitis stage, you can reverse the swelling in about two weeks with consistent oral hygiene. The key is removing the plaque that’s triggering inflammation, then keeping it from coming back.
Why Gums Swell in the First Place
A thin film of bacteria called plaque forms constantly on your teeth, especially along the gumline. These bacteria feed on sugars in your mouth, and their waste products irritate gum tissue. If plaque isn’t removed, your gums can become inflamed within just a few days. That inflammation is your immune system’s response to the bacterial buildup, and it shows up as redness, puffiness, and bleeding when you brush.
Left alone, gingivitis progresses to periodontitis, where the infection moves below the gumline and starts destroying the bone that holds your teeth in place. Dentists measure this with a small probe: pockets of 1 to 3 millimeters are healthy, 4 to 5 millimeters indicate moderate disease, and anything 6 millimeters or deeper signals severe periodontitis. The goal is to catch things while pockets are still shallow and damage is reversible.
Home Care That Actually Works
The single most effective thing you can do is remove plaque thoroughly, twice a day, every day. Brush for a full two minutes with a soft-bristled toothbrush, angling the bristles toward the gumline at about 45 degrees. Floss or use an interdental brush once daily to clean the spaces your toothbrush can’t reach. This is where plaque hides and where swelling usually starts.
A saltwater rinse can reduce inflammation between brushings. Mix half a teaspoon of salt into a cup of warm water, swish for 30 seconds, and spit. You can do this two to three times a day. For something with mild antimicrobial properties, add 3 drops of tea tree oil to a cup of warm water and use it as a rinse. Pure aloe vera juice can also be swished undiluted in your mouth up to three times daily.
If your face feels swollen or you’re in pain, 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 helps with both pain and inflammation. Over-the-counter anti-inflammatory pain relievers can also take the edge off while your gums heal.
The Two-Week Timeline
With consistent brushing, flossing, and rinsing, most people see a noticeable reduction in gum swelling within about two weeks. The bleeding typically stops first, followed by the puffiness going down and the color shifting from deep red back to a healthy pink. This timeline applies to gingivitis only. If you’ve been dealing with swollen gums for months or notice your teeth feeling loose, the damage may have progressed beyond what home care alone can fix.
When You Need a Deep Cleaning
If plaque has hardened into tarite (calculus) below the gumline, no amount of brushing will remove it. That’s when a dentist performs scaling and root planing, often called a deep cleaning. The procedure uses hand instruments or ultrasonic tools to scrape plaque and tartar from tooth surfaces both above and below the gumline, then smooths the root surfaces so gums can reattach more easily. Your gums are numbed beforehand, and the whole process is done in one or two visits.
Recovery is straightforward. Most people return to normal activities the same day. Your gums may feel sore for a couple of days afterward, and tooth sensitivity to hot and cold is common but fades within a month or two. In some cases, your dentist will place antibiotics directly around the tooth roots or prescribe a short oral course to help clear the infection.
Swelling Caused by Hormones
Pregnancy is one of the most common non-plaque triggers for swollen gums. Estrogen and progesterone levels rise dramatically during pregnancy, reaching 10 and 30 times their normal levels by the third trimester. These hormones change how gum tissue responds to bacteria, making the inflammatory reaction much stronger than it would normally be. The result is gums that bleed and swell even with relatively small amounts of plaque.
The good news is that diligent plaque control can partially offset this hormonal effect. Brushing and flossing carefully throughout pregnancy won’t eliminate the swelling entirely, but it significantly limits how severe it gets. Gum inflammation typically improves after delivery as hormone levels return to normal.
Medications That Cause Gum Swelling
Certain medications cause the gums to physically enlarge, a condition called gingival overgrowth. This makes teeth harder to clean and creates a cycle where plaque accumulates in the excess tissue, worsening the swelling. Three drug classes are responsible for the vast majority of cases:
- Seizure medications: Phenytoin is the biggest offender, causing gum enlargement in roughly 50% of adults who take it.
- Immune-suppressing drugs: Cyclosporine, commonly prescribed after organ transplants, triggers overgrowth in about 53% of kidney transplant patients.
- Blood pressure medications (calcium channel blockers): Nifedipine and amlodipine are the most common culprits, affecting around 20% of users.
If you take one of these medications and notice your gums growing over your teeth, talk to your prescribing doctor. In some cases, switching to an alternative medication resolves the problem. Meticulous oral hygiene and professional cleanings can help manage it in the meantime.
Nutritional Deficiencies to Consider
Vitamin C plays a direct role in gum health. Severe deficiency leads to scurvy, which causes swollen, bleeding gums, loose teeth, and muscle weakness. Full-blown scurvy is rare in developed countries, but mild deficiency is more common than you’d think, especially in people with very limited fruit and vegetable intake, smokers, and older adults. If your diet is lacking, increasing your intake of citrus fruits, bell peppers, strawberries, and broccoli can make a real difference. For diagnosed deficiency, therapeutic doses of 500 mg of vitamin C daily for at least two weeks are used to correct the problem.
Signs That Need Urgent Attention
Most gum swelling is a slow-building problem, not an emergency. But a gum abscess, a pocket of pus that forms from a trapped infection, is a dental emergency. Watch for a localized, painful bump on your gums that may ooze a foul-tasting fluid, along with a persistent toothache, sensitivity, bad breath, or a loose tooth. These all point to an abscess that needs professional drainage.
If you develop a fever, chills, nausea, difficulty breathing, or difficulty swallowing alongside gum swelling, the infection may be spreading. These symptoms warrant an emergency room visit, not a wait-and-see approach.