Causes of a Metallic Taste in Your Mouth

It can be unsettling and frustrating to have a constant metallic taste in your mouth. But in most cases, it’s nothing to panic about — and often reversible.

In many situations, the taste disappears on its own once certain medications are stopped or lifestyle factors change. Occasionally, however, it can be a sign of an underlying or undiagnosed condition.

If you’re otherwise healthy, there’s usually a simple explanation — and at Christchurch Dental Practice, we help you work through the likely causes so you can set aside unnecessary worry.

The medical name for distorted taste, including a metallic taste, is dysgeusia. When there’s a complete loss of taste, it’s called ageusia.

Let’s look at the most common reasons behind metallic taste.

Medications

The most common cause is a side effect of medications.

Common culprits include:

• Some antibiotics (such as metronidazole or clarithromycin)
• Metformin (used for diabetes)
• Chemotherapy or radiation treatments
• Antidepressants
• Certain heart medications

If you notice the metallic taste soon after starting a new prescription, it’s worth contacting your GP or pharmacist. Sometimes, a change in dosage or medication can help.

Poor Oral Health

Good oral hygiene is essential — brushing twice daily for two minutes, using floss or interdental brushes, and keeping up with regular dental check-ups and hygienist appointments.

At Christchurch Dental, we provide tailored advice to help you improve and maintain your oral health. Our dentists and hygienists take the time to understand your specific concerns and recommend the best tools and techniques for you.

For example:

• Are interdental brushes better for you than floss?
• Should you be using a manual or electric toothbrush?
• How hard should you be brushing?
• Where might you be missing in your daily routine?

A metallic taste can sometimes be an early sign of:

• Bacterial infections (like gingivitis or periodontitis)
• Fungal infections (such as oral thrush)
• Dry mouth (often caused by medications like antidepressants)

Many of these conditions improve with better oral hygiene and appropriate treatment.

At Christchurch Dental, we take pride in offering first-class care — giving you the time and attention you need to get your oral health right.

Sinus Issues or Sinusitis After a Viral Infection

Because the mouth and nose are closely linked, sinus problems can affect your sense of taste.

Viral illnesses like the common cold, allergies, COVID-19, and ear infections can all lead to altered taste sensations.

These symptoms usually resolve within a few weeks, but if they persist, it’s a good idea to consult your GP.

Pregnancy

Interestingly, a metallic taste is often one of the first signs of pregnancy, caused by hormonal shifts, particularly in the first trimester.

The good news is, this usually fades as the pregnancy progresses.

When Should You Seek Help?

While most causes of a metallic taste are harmless and temporary, it’s important to seek advice if:

• The taste persists for more than two weeks
• You experience other concerning symptoms
• It’s affecting your appetite or enjoyment of food

Your dentist or GP can help determine if further investigation is needed.

At Christchurch Dental, our experienced team is here to help you identify if the problem is dental-related — and get you back on the right track.

Need Advice? We’re Here to Help

If you’re concerned about a persistent metallic taste or want a full oral health check-up, we’re here for you.

👉 Book your consultation today and let’s make sure your mouth is as healthy and comfortable as it should be.