The earliest sign of a gum infection is usually bleeding when you brush or floss, often paired with redness and swelling along the gumline. Many people miss this because gum infections, especially in the early stage called gingivitis, rarely cause pain. Over 42% of American adults age 30 and older have some form of gum disease, and most of them developed it without realizing anything was wrong.
What Healthy Gums Look Like
Knowing what’s normal makes it easier to spot what isn’t. Healthy gums are light pink, firm to the touch, and sit snugly around each tooth without gaps. They don’t bleed when you brush or floss, and they have a slightly stippled texture, similar to the surface of an orange peel.
If your gums look puffy, feel soft, or have shifted from pink to a deeper red, that’s the first visual clue something is off. Color changes can range from bright red in early infection to dark red or even purple when infection has spread deeper into the tissue. Pale or white gums can also signal early plaque buildup, and grey gums sometimes point to a bacterial or fungal infection.
Early Signs: Gingivitis
Gingivitis is the mildest form of gum infection, and it’s almost entirely painless. That’s why it often goes undetected for weeks or months. The main signs are red, swollen gums that bleed when you clean your teeth, and sometimes bleed for no obvious reason at all. You might notice pink on your toothbrush or blood when you spit after brushing.
At this stage, the infection is limited to the surface of the gum tissue. No bone loss has occurred, and the damage is fully reversible with improved brushing, flossing, and a professional cleaning. But if left untreated, gingivitis can progress to periodontitis within weeks to months.
Advanced Signs: Periodontitis
Periodontitis develops when infection moves below the gumline and begins breaking down the bone and connective tissue that hold your teeth in place. Like gingivitis, it often causes no symptoms until it’s fairly advanced, which is what makes it dangerous.
When symptoms do appear, they include:
- Receding gums. Your teeth look longer than they used to because the gum tissue is pulling away from the tooth.
- Gum pockets. Gaps form between the gums and teeth. During a dental exam, your dentist measures these with a small probe. Depths of 3 mm or less are healthy. At 4 mm, you’re in a gray zone. At 5 mm or more, there’s active tissue and bone loss.
- Persistent bad breath. Bacteria trapped in deep gum pockets produce sulfur compounds that cause a foul smell and an unpleasant taste in your mouth, even after brushing.
- Loose or shifting teeth. As bone support erodes, teeth may wobble, shift position, or hurt when you chew.
- Sensitivity. Exposed tooth roots from gum recession can make teeth react sharply to hot, cold, or sweet foods.
The critical difference between gingivitis and periodontitis is reversibility. Gingivitis can be cleared up completely. Periodontitis involves permanent bone loss that can only be managed, not undone.
How to Tell a Gum Abscess From General Swelling
A gum abscess is a pocket of pus that forms inside the gum tissue, usually along a deep gum pocket or at the base of a tooth. It’s a more acute infection than general gum disease and typically demands faster attention.
The hallmark signs are a visible, raised bump on the gum that feels tender to touch, pain that gets worse when you bite down, and a bad taste in your mouth from pus draining into the area. You might be able to see or feel the bump with your tongue. Pressing on it can produce a small amount of discharge.
Not all abscesses are painful, though. A chronic abscess can linger with little or no pain, sometimes draining through a small opening in the gum called a sinus tract. If you notice a persistent pimple-like bump on your gums that comes and goes, that’s worth getting checked even if it doesn’t hurt. In rare cases, the infection spreads enough to cause swollen lymph nodes under your jaw or in your neck, which signals the infection has moved beyond the local area.
Gum Pain vs. Toothache
It’s not always obvious whether the discomfort you’re feeling comes from your gums or from a tooth itself, and the distinction matters because the causes and treatments are different.
Pain from a gum infection tends to be diffuse, spread across a section of gum tissue, and associated with visible redness or swelling. It often worsens with brushing or flossing and may come with bleeding. Gum infections in the early stages cause little to no pain at all.
A toothache, on the other hand, is usually sharp, localized to a single tooth, and triggered by temperature or pressure. If biting into something sends a jolt of pain through one specific tooth, or if hot and cold drinks cause a lingering ache, the problem is more likely inside the tooth itself: a cavity, a crack, or an inflamed nerve. A tooth abscess can produce a red, swollen bump near the base of the tooth that looks similar to a gum abscess, but the source is the tooth’s root rather than the surrounding gum tissue.
Both conditions can exist at the same time. Advanced gum disease weakens the structures around a tooth, which can eventually affect the tooth’s nerve. If you’re unsure what’s causing your pain, the location and type of swelling are your best clues.
Signs You Might Miss
Some symptoms of gum infection are easy to overlook or attribute to something else. A metallic taste in your mouth, for example, can come from blood seeping from inflamed gums even when you can’t see obvious bleeding. Persistent bad breath that doesn’t improve with brushing or mouthwash is one of the most common signs of deeper gum disease, caused by sulfur-producing bacteria thriving in pockets below the gumline.
Changes in how your teeth fit together when you bite down can also signal shifting caused by bone loss. If your bite feels different or a partial denture no longer fits the way it used to, that’s worth investigating. Some people first notice gum disease because food starts getting stuck between teeth in spots where it never did before, a result of gum recession creating new gaps.
Who’s Most at Risk
Gum disease becomes more common with age. About 30% of adults between 30 and 44 have some form of periodontitis. That number jumps to 46% for adults 45 to 64, and nearly 60% for those 65 and older. Smoking is one of the strongest risk factors, both for developing gum disease and for making it harder to treat. Diabetes, hormonal changes during pregnancy, and medications that reduce saliva flow also increase susceptibility. Genetics play a role too: some people are more prone to aggressive gum disease even with good oral hygiene.
What Happens at a Dental Exam
The only way to confirm a gum infection and determine how far it’s progressed is a dental evaluation. Your dentist or hygienist will use a small measuring instrument to check the depth of the space between each tooth and the surrounding gum. These measurements, taken at six points around every tooth, create a map of your gum health. Pockets deeper than 3 mm, combined with bleeding on probing, indicate active disease. X-rays show whether bone loss has occurred beneath the gumline, which isn’t visible from the surface.
If your gums bleed regularly, look redder or puffier than usual, or if you’ve noticed any of the symptoms above, those are signs worth acting on. Gingivitis caught early can be reversed in a matter of weeks with consistent cleaning. Once it progresses to periodontitis, treatment becomes more involved and the goal shifts from cure to management.