You know that sticky, cottony feeling when you wake up thirsty in the middle of the night? Now imagine feeling that way most of the day. That’s dry mouth. And it’s not just uncomfortable.
A lot of people don’t realize that dry mouth, what your dentist might call xerostomia (big word, simple problem), can actually hurt your teeth. Like, really hurt them.
Here at Hillsborough Family & Cosmetic Dentistry, we see this all the time. A patient comes in with a sudden spike in cavities, even though they haven’t changed their brushing habits. And when we ask the right questions, the culprit is almost always the same: not enough saliva.

Saliva Does More Than You Think
We don’t usually give saliva much thought. It’s just there, right? But here’s the thing: your saliva is your mouth’s natural defense system.
It washes away food particles. It neutralizes acids from coffee, soda, or even healthy snacks like fruit. And it fights bacteria. It even helps you taste and swallow your food.
Think of saliva like a gentle, constant rinse cycle for your teeth. When that rinse cycle slows down or stops, bacteria throw a party. And cavities, gum inflammation, and even bad breath are the uninvited guests that show up.
What Causes Dry Mouth?
Most people are surprised to learn that dry mouth isn’t a normal part of aging. It’s usually caused by something specific.
Here are the biggest reasons we see in our Hillsborough office:
- Medications: This is the number one cause. Hundreds of common medications list dry mouth as a side effect. Things like blood pressure meds, antidepressants, allergy pills (antihistamines), and muscle relaxants. If you take two or more medications, the effect can double.
- Mouth breathing: Especially at night. Breathing through your mouth all night literally dries out your oral tissues. This is super common in people with allergies or sinus issues, which, let’s be honest, plenty of us in North Carolina deal with.
- Dehydration: Not drinking enough water throughout the day. Coffee and tea don’t count, they actually can make things worse.
- Cancer treatments: Radiation to the head or neck and certain chemotherapy drugs can damage saliva glands. This one is usually temporary, but not always.
- Autoimmune conditions: Sjögren’s syndrome, lupus, diabetes, and rheumatoid arthritis can all affect saliva production.
How to Know If You Have It
You don’t need a test. You’ll feel it. Common signs include:
- A sticky or dry feeling in your mouth
- Trouble chewing, swallowing, or tasting
- A burning feeling on your tongue
- Cracked lips or sores at the corners of your mouth
- Waking up at night needing water
And on our end? We’ll see more cavities along the gum line, more plaque buildup, and red, irritated gums that bleed easily.
What You Can Do (And How We Can Help)
The good news is dry mouth is usually manageable. Here’s where to start:
- Sip water throughout the day. Not just when you feel thirsty.
- Use a humidifier at night. Especially in your bedroom.
- Chew sugar-free gum or suck on sugar-free lozenges. This encourages your saliva to flow.
- Avoid alcohol, caffeine, and tobacco. All three dry you out.
- Ask us about dry mouth rinses or sprays. Some are over-the-counter; others we can recommend based on your situation.
If you take medications, do not stop taking them on your own. Instead, bring a list to your next appointment. Dr. Mike can talk with you about whether adjusting the timing or talking to your regular doctor might help.
Treat Your Dry Mouth Today
Dry mouth isn’t just annoying. It’s a real threat to your smile. But it’s also something we can work on together.
If you’ve noticed your mouth feeling drier than usual, or if you’ve suddenly had a string of cavities and don’t know why, give us a call. We’ll listen, we won’t rush you, and we’ll help you figure out what’s going on.
New patients can reach us at 919-587-8401 or request an appointment online. We’re right here on Millstone Drive in Hillsborough, and we’d love to help you feel better.
