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Reasons Why Underside of Your Tongue May Hurt - VA Dentists
Nothing throws a wrench in your day quite like a sharp, nagging pain right under your tongue. You feel it when you swallow your morning coffee, when you try to chat with a coworker, or even when you’re just sitting still.
I see patients in my Falls Church dental clinic all the time who are genuinely worried about this exact issue. They rush in, point to the spot, and say, “Doc, I don’t know what’s going on.”
I get it. That area is so sensitive that any little ache feels like a major emergency. But here’s the good news. Most of the time, the reasons why underside of your tongue may hurt are completely harmless and easy to fix.
It might be a tiny cut, a stress-induced ulcer, or just your body telling you it’s missing a key vitamin.
In this post, I’ll walk you through the usual suspects, share some easy home remedies, and explain exactly when you should pick up the phone and call us at Broadway Dental Associates.
The Main Reasons Your Tongue is Throwing a Fit
Let’s get to the bottom of it. There isn’t just one reason for this pain.
In my experience, it’s usually one of five common culprits. Let me break them down for you.
1. The Notorious Canker Sore (Aphthous Ulcer)
This is the number one offender I see in my exam chair. Canker sores are those tiny, shallow little monsters that pop up on the soft tissues in your mouth.
They are usually round or oval, white or yellowish in the center, with a nasty red border that screams when touched.
If you have a sore on side of tongue or directly underneath it, chances are you have a canker sore. The funny (and frustrating) thing is, we don’t know exactly what causes them. But we do know what wakes them up.
Stress is a huge trigger. So is eating too many acidic foods, like oranges, tomatoes, or that extra-hot salsa you love. Sometimes, a minor accidental bite is all it takes to start one.
Now, a lot of people get these confused with cold sores. Here’s the difference.
Cold sores are caused by a virus and are contagious.
Canker sores? Not contagious at all.
You can’t give one to your partner. But they sure are painful. They usually take about one to two weeks to heal on their own.
2. Accidental Trauma (The "Oops, I Bit My Tongue" Scenario)
Let’s be honest. Have you ever been so hungry that you ate way too fast?
I know I have. When you’re rushing through a meal, it’s incredibly easy to accidentally chomp down on the side or underside of your tongue.
Since that tissue is super thin and fragile, even a small bite can leave a deep, painful mark.
And it’s not just biting. I’ve had patients come in after burning their tongues on hot pizza cheese or scalding coffee. The steam alone can leave the area raw and swollen.
If you’re a fan of crunchy snacks like tortilla chips or hard candy, those sharp edges can also create tiny cuts underneath your tongue. Most of these injuries heal quickly, but they hurt like crazy while they do.
3. The Sneaky Salivary Gland Stone (Sialolithiasis)
This one is a little less common, but it’s a classic. You have a major salivary gland on each side, located right under the floor of your mouth.
Occasionally, the minerals in your saliva can harden and clump together, forming a tiny stone. This stone can block the duct, trapping saliva inside.
How do you know if you have one? You’ll feel pain or swelling that gets much worse when you eat, talk, or even think about food.
This happens because your mouth tries to release saliva to help you digest, but the stone blocks the flow, causing pressure and intense pain.
It’s a sharp, stinging sensation that usually calms down an hour or so after you finish eating.
4. You Might Be Missing Some Nutrients
Sometimes, the pain under your tongue isn’t about an injury or a stone. It’s about what’s happening inside your body.
I’ve seen many patients whose only symptom of a vitamin deficiency was a sore, red, or unusually smooth tongue. Medical professionals call this glossitis, but you’ll just call it uncomfortable.
If you are low on Vitamin B12, iron, or folate, your body can’t maintain the healthy mucous membranes in your mouth.
The tongue becomes tender, swollen, and sometimes develops a burning sensation. It’s your body waving a little flag, asking for more nutrients.
5. Irritation from Dental Appliances
Do you wear braces, a retainer, or partial dentures? Those devices are great for your smile, but they can be tough on your tongue.
If a wire slips out of place or a retainer has a rough edge, it will rub against the delicate tissue under your tongue constantly. This friction causes a localized sore that will not heal until the appliance is adjusted.
If you’re feeling a sharp poke every time you move your mouth, don’t just suffer through it. That’s a sign you need to come see us for a quick fix.
How to Get Rid of the Pain (Without Losing Your Mind)
If your pain falls into the “treat at home” category, you can get relief pretty quickly. I always tell my patients to try these simple methods first.
Rinse with warm salt water. This is the oldest trick in the book, and it works. Salt is a natural disinfectant. It helps reduce swelling and keeps the area clean so it can heal faster.
Just mix half a teaspoon of salt into a cup of warm water. Swish it around for about 30 seconds, focusing on the painful spot, then spit it out. Do this two or three times a day.
Watch what you eat. If you have a sore or a cut, the last thing you want to do is pour lemon juice or hot sauce on it. Stick to bland, soft foods for a few days.
Think yogurt, mashed potatoes, or smoothies. Avoid anything crunchy, spicy, or highly acidic.
Try over-the-counter gels. Pharmacies sell gels and ointments specifically for mouth pain. Look for something with lidocaine or benzocaine.
These topical anesthetics will numb the area temporarily, giving you a break from the pain so you can eat or sleep.
Use dental wax (for appliance issues). If your braces or retainer are rubbing, dental wax is a lifesaver. Just roll a tiny ball of wax and stick it over the sharp edge of the bracket or wire.
It creates a smooth barrier between the metal and your tongue until you can come to see us.
What Happens If You Come to See Us?
If you try the home remedies and the pain sticks around, or if you fall into the “Visit Your Dentist” category, don’t worry. We’ve got you covered at Broadway Dental Associates.
When you come in for a check-up, I will do a few things to figure out the root cause.
First, I’ll take a good look. I’ll ask you to lift your tongue so I can see the floor of your mouth. Often, the cause is obvious just by looking.
If I suspect you have a salivary stone, I might gently palpate (press on) the area to see if I can feel the blockage.
If the issue is related to a nutritional deficiency, I might ask you about your diet or recommend a blood test to check your vitamin levels.
In the rare case that I see a suspicious lump or a lesion that just won’t heal, I might suggest a biopsy to rule out anything serious, like oral cancer.
I don’t say this to scare you. I say it because catching things early is the best way to keep you healthy. Remember, a sore on the side of the tongue that doesn’t heal within two weeks should never be ignored.
How to Stop This From Happening Again
Prevention is always better than treatment. Here is how you can keep your tongue happy and pain-free moving forward.
First, manage your stress. I know, easier said than done, right? But since stress is a major trigger for canker sores, finding ways to relax actually helps your mouth. Try deep breathing, going for a walk, or just taking five minutes to yourself.
Second, eat a balanced diet. Make sure you are getting enough B vitamins, iron, and folate. Foods like leafy greens, eggs, meat, and fortified cereals are great for this. It might also help to switch your toothpaste.
Some toothpastes contain a foaming agent called SLS. For some people, SLS can actually cause or worsen mouth ulcers. Trying an SLS-free brand might make a huge difference for you.
Finally, keep up with your routine cleanings. When you come to see us every six months for a regular exam, we catch small problems before they become big, painful ones.
You can read more about why I emphasize importance regular checkups so much by visiting our blog.
Frequently Asked Questions (FAQ)
1. When should I go to the doctor for tongue pain?
You should see a dentist if the pain lasts longer than two weeks, is accompanied by a fever, makes it hard to swallow, or if you see a lump that doesn’t change shape.
2. Why does my tongue hurt under my tongue?
It usually hurts due to canker sores, minor injuries (biting/burning), salivary stones, vitamin deficiencies, or irritation from dental appliances like braces.
3. Can stress cause pain on the side of my tongue?
Absolutely. Stress is a major trigger for canker sores and can also lead to habits like teeth grinding or chewing on your tongue, which causes muscle strain and pain.
4. Can a sharp tooth cause tongue pain?
Yes, definitely. A chipped tooth or a rough filling can rub against your tongue every time you talk or swallow, creating a painful sore.
5. Why does the bottom of my tongue hurt when I eat?
This is a classic sign of a salivary gland stone. When you eat, your glands produce saliva, but if a stone blocks the duct, the pressure causes sharp pain under the tongue.
Let’s Get You Feeling Better
Living with that annoying, stinging pain under your tongue is no fun. But you don’t have to just tough it out. Most of the time, a little salt water and a few days of soft foods are all you need.
However, if that pain is sticking around for longer than two weeks, or if it’s making you miserable, please come see me.
At Broadway Dental Associates, we make it easy to get the help you need. You can bring your whole family to our Falls Church Dental Clinic and feel confident that we’ll take great care of you.
Don’t let the fear of the unknown keep you in pain. We are here to help you figure out exactly what is going on.
Ready to get some relief? Book your appointment online with us today. You deserve to feel comfortable and smile without wincing.
And hey, if you’re worried about the cost of treatment, we get it. We offer flexible options to make sure you get the care you need.
Check out our Payments Plan page for more info.
If you need us right now because the pain is severe, don’t wait.
