Dry mouth (xerostomia) means not making enough saliva, and it’s far more than a minor nuisance — saliva protects your teeth, so a persistently dry mouth raises the risk of decay, gum problems, bad breath and infections. The most common cause is medication (hundreds of everyday drugs reduce saliva), and the risk rises with age as more medications are taken. The good news is that dry mouth can be managed, and protecting your teeth around it is very achievable.

Here’s why saliva matters so much, what causes dry mouth, and the practical steps that help.

Why saliva matters

Saliva does a lot of quiet, important work: it neutralises the acids that cause decay, washes away food and bacteria, carries minerals that repair early enamel damage, helps you taste, chew and swallow, and keeps the soft tissues comfortable. When saliva drops, all of that protection drops with it — which is why a dry mouth so often leads to rapid decay (especially on the roots), gum irritation, mouth ulcers, and a higher chance of oral thrush. Treating the dryness isn’t about comfort alone; it protects your teeth.

Common causes

By far the most common cause is medication. Drugs for blood pressure, depression and anxiety, allergies, bladder problems, pain and many others reduce saliva, and taking several at once (common with age) multiplies the effect. Other causes include certain medical conditions and autoimmune diseases, radiotherapy to the head and neck, dehydration, mouth breathing and snoring, smoking and alcohol, and anxiety. Ageing itself plays a smaller role than people think — it’s usually the medications that come with age that are responsible.

Signs you might have dry mouth

• A sticky, dry feeling in the mouth, or needing to sip water to swallow or speak
• A dry or sore throat, cracked lips, or a dry, rough tongue
• Bad breath that won’t shift, and an altered sense of taste
• Difficulty wearing dentures comfortably
• More cavities than usual, particularly near the gum line

What you can do at home

Several simple measures help. Sip water regularly through the day and keep some by the bed; chew sugar-free gum or use sugar-free lozenges to stimulate saliva; and use over-the-counter dry-mouth products — saliva substitute sprays, gels and rinses (alcohol-free) — especially overnight. Limit caffeine, alcohol and smoking, which dry the mouth further, and run a humidifier in the bedroom if dryness is worse at night. Don’t reach for sugary drinks or lollies to relieve the dryness, as that compounds the decay risk.

Protecting your teeth

Because dry mouth accelerates decay, your home care matters even more. We may recommend a high-fluoride toothpaste, more frequent cleans, and tailored advice to protect the vulnerable root surfaces. Telling us about every medication you take is genuinely useful — we can’t change your prescriptions, but we can build a protection plan around them, and sometimes your GP can review whether an alternative medication is possible.

When to seek help

See us if dry mouth is persistent, uncomfortable, or you’re noticing new decay or sore spots, and see your GP if it came on suddenly, is severe, or comes with other symptoms like dry eyes or joint pain (which can point to an underlying condition worth investigating). Dry mouth is common and manageable, but it shouldn’t just be put up with — there’s a lot we can do.

Book an exam

If your mouth often feels dry, book an exam and bring your medication list. We’ll check your teeth and gums, set up a protection plan, and suggest the products most likely to help. Patients across Winmalee, Springwood, Hazelbrook and the Blue Mountains are welcome.

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