Gum pain usually comes from inflammation, and the most common trigger is bacterial plaque building up along the gumline. But several other causes, from brushing too hard to hormonal shifts to certain medications, can make your gums tender, swollen, or sore. About 42% of American adults over 30 have some form of gum disease, so if your gums hurt, you’re far from alone.
Gum Disease: The Most Common Cause
The earliest stage of gum disease, called gingivitis, happens when plaque bacteria irritate your gum tissue. Your gums may look red or puffy and bleed when you brush or floss. The tricky part is that gingivitis doesn’t always cause obvious symptoms, so some people have it without realizing it.
If gingivitis goes untreated, it can progress to periodontitis, a more serious condition where the gums start pulling away from the teeth and forming deeper pockets. Bacteria settle into those pockets where your toothbrush can’t reach, and over time, the bone supporting your teeth breaks down. This is what eventually leads to loose teeth and tooth loss. Nearly 60% of adults 65 and older have periodontitis, but it affects younger adults too, with about 8% of people over 30 already dealing with a severe form.
Your dentist measures the depth of gum pockets in millimeters during a checkup. Healthy gums sit tight against the teeth with shallow pockets. In early periodontitis, pockets reach about 4 mm. In advanced stages, they can be 6 mm or deeper, which signals significant damage to the tissues and bone underneath.
Brushing Too Hard
Aggressive brushing is one of the most overlooked reasons gums hurt. Scrubbing with a hard-bristled toothbrush or pressing too firmly wears down the delicate tissue along your gumline, eventually causing gum recession. Once gums recede, the root surface of the tooth becomes exposed, which creates sensitivity to hot, cold, and sweet foods, along with a persistent soreness near the gumline.
Switching to a soft-bristled toothbrush and using gentle, short strokes makes a real difference. The American Dental Association recommends brushing twice a day for two minutes with fluoride toothpaste. More pressure doesn’t mean cleaner teeth. It just damages soft tissue.
Hormonal Changes
Pregnancy is a well-known trigger for gum pain. Rising progesterone levels during pregnancy amplify the body’s inflammatory response to plaque bacteria, so even women with good oral hygiene can develop swollen, red, tender gums that bleed easily. This condition, sometimes called pregnancy gingivitis, affects a large number of pregnant women and typically worsens if plaque isn’t kept in check.
The hormonal shift doesn’t just increase inflammation directly. Higher progesterone also creates an environment where bacteria thrive more easily around the gumline, compounding the problem. Puberty, menstruation, and menopause can produce similar (though usually milder) effects on gum tissue for the same reason: fluctuating hormone levels change how your body reacts to the bacteria already in your mouth.
Medications That Cause Gum Overgrowth
Certain prescription medications can cause your gum tissue to literally grow over your teeth, a condition called gingival overgrowth. The swollen, thickened tissue becomes sore, makes cleaning difficult, and traps more bacteria underneath. Three classes of drugs are the main culprits:
- Anti-seizure medications: Phenytoin is the most well-known offender. Roughly half of the people taking it develop some degree of gum overgrowth. Other anti-seizure drugs, including carbamazepine and valproic acid, carry a smaller but real risk.
- Blood pressure medications (calcium channel blockers): Nifedipine causes gum overgrowth in about 38% of users. Diltiazem sits around 20%, while others in this class have lower but documented rates.
- Immunosuppressants: Cyclosporine, used after organ transplants and for certain autoimmune conditions, causes gum overgrowth in anywhere from 13% to 85% of patients depending on the study.
If you’re on one of these medications and notice your gums swelling or feeling painful, your dentist and prescribing doctor can work together on a plan. Sometimes more rigorous cleaning helps, and sometimes an alternative medication is an option.
Vitamin Deficiency
Vitamin C plays a critical role in building and maintaining collagen, the structural protein that holds your gum tissue together. When your body doesn’t get enough, gums become spongy, swollen, and prone to bleeding. In severe deficiency (scurvy), gums deteriorate to the point where teeth loosen. This is rare in developed countries, but people with very restricted diets, chronic alcohol use, or absorption issues can develop low vitamin C levels that show up first as gum problems, easy bruising, and poor wound healing.
Dental Abscess: When Gum Pain Is Urgent
Sometimes gum pain signals a bacterial infection that has formed a pocket of pus, called an abscess, at the root of a tooth or in the gum tissue itself. The hallmarks are hard to miss: severe, constant, throbbing pain that may radiate to your jaw, neck, or ear. You might also notice a foul taste in your mouth, swollen lymph nodes under your jaw, or visible swelling in your face or cheek.
A fever combined with facial swelling is a red flag that the infection may be spreading. If you develop difficulty breathing or swallowing alongside these symptoms, that’s an emergency. The infection can extend into the jaw, throat, or neck and become life-threatening without treatment.
Other Common Triggers
Several everyday situations can make your gums sore without signaling a deeper problem. New orthodontic appliances or poorly fitting dentures create friction against the tissue. Canker sores on the gums cause localized pain that typically resolves on its own within a week or two. Eating sharp or very hot foods can injure the tissue and leave it tender for a few days. Tobacco use, whether smoked or chewed, irritates gum tissue directly and also suppresses blood flow, slowing healing and masking early warning signs of gum disease.
Relieving Gum Pain at Home
A saltwater rinse is one of the simplest and most effective ways to soothe irritated gums. Mix one teaspoon of salt into eight ounces of warm water and swish gently for 30 seconds. If your mouth is especially tender, start with half a teaspoon of salt for the first day or two. The salt draws fluid out of swollen tissue and helps reduce bacterial load temporarily.
Beyond saltwater, keeping up with daily oral hygiene is the single most impactful thing you can do. Brush twice a day for two minutes with a soft-bristled brush, and clean between your teeth daily. Flossing works, but the best interdental cleaning method is whichever one you’ll actually use consistently, whether that’s traditional floss, a water flosser, or interdental brushes. If your gums bleed when you start flossing after a long break, that’s common and usually improves within a week or two of regular use.
Over-the-counter pain relievers can help manage soreness while you address the underlying cause. Avoiding very hot, spicy, or acidic foods gives irritated tissue a chance to calm down. If gum pain persists beyond a week or two despite good home care, or if you notice your gums pulling away from your teeth, that’s worth a dental visit to check for something that needs professional treatment.