Metal taste in the mouth - causes, symptoms and treatment | Dentme

Metallic taste in the mouth can be both uncomfortable and confusing. It is a relatively common symptom that can be caused by anything from temporary changes in the oral environment to longer-term medical conditions. Sometimes the taste disappears quickly, but if it lingers, it is wise to have a dentist investigate the cause.

"A metallic taste in the mouth can be caused by something as simple as a new medication or inflammation of the gums. But if the taste persists, it should always be investigated."
- Erik, dentist at Dentme

What is metallic taste in the mouth?

Metallic taste, also known as dysgeusia, means that you experience a metallic or strange taste in your mouth without anything metallic being there. It can affect appetite, enjoyment of food and even your breath. In some cases, it can be the first sign of an underlying health problem.

Common causes of metallic taste

Inflammation or bleeding in the mouth

Bleeding gums, often due togingivitis, is a common cause. Blood contains iron, which gives a distinct metallic taste.

Dry mouth

Too little saliva changes the taste experience. Dry mouth can be caused by medicines, stress, breathing problems or diseases such as Sjögren's syndrome.

Medicines and food supplements

Antibiotics, iron supplements, blood pressure medicines, heart medicines and some multivitamins affect the sense of taste.

Hormonal changes

Pregnancy, menopause and the contraceptive pill can temporarily alter the taste experience.

Food

Iron-rich foods, strong spices and the use of metal cutlery can contribute to the taste.

Reflux and stomach problems

In case of heartburn or acid reflux, stomach acid can affect taste and breath.

Infections and systemic diseases

Respiratory infections, COVID-19, kidney failure, liver diseases and neurological conditions can cause metallic taste - especially if other symptoms are present.

Zinc deficiency

Zinc is important for taste function. Deficiency can lead to taste changes, especially in the elderly.

Dental fillings and prosthetic materials

Metallic fillings, crowns or dentures can in rare cases cause a galvanic reaction (bimetallic reaction) that produces metallic taste.

When should you seek medical help?

You should contact your dentist or doctor if:

- The metallic taste lasts longer than a week

- You notice bleeding, sores or swelling in your mouth

- Taste affects appetite or well-being

- You have recently started taking a new medicine

- You suspect a link to a more serious disease or COVID-19

What can you do yourself?

- Improving oral hygiene - brush your teeth and tongue twice a day, floss and use a mild mouthwash.

- Drink more water - reduces dry mouth and flushes away bacteria.

- Change toothpaste - choose a mild variety without sodium lauryl sulfate (SLS).

- Avoid triggers - such as iron supplements, metal cutlery and strong flavors.

- Chewing sugar-free chewing gum - stimulates saliva production.

- Review medicines and food supplements - in consultation with a doctor.

Treatment by a dentist

The dentist does a thorough examination to:

- Check gums, tongue and mucous membranes

- Assess any dry mouth or infection

- Examining fillings and prosthetic materials

- Refer to doctor if systemic cause suspected

Frequently asked questions about metallic taste in the mouth

How long does metallic taste last in the mouth?
In most cases, the taste disappears within a few days to a week, but it depends on the cause.

Can toothpaste cause metallic taste?
Yes, especially toothpastes with strong flavorings or foaming agents like SLS.

Is it dangerous to have metallic taste in your mouth?
Not per se, but if it doesn't go away, you should seek medical attention to rule out underlying disease.

Can pregnancy cause metallic taste?
Yes, hormonal changes during pregnancy often affect the sense of taste.

Can COVID-19 leave a metallic taste in your mouth?
Yes, altered sense of taste is a common symptom of SARS-CoV-2 infection.

Can dental fillings cause metallic taste?
In some cases, metallic fillings can cause galvanic reactions that produce a metallic taste.

Do zinc supplements help with metallic taste?
In cases of zinc deficiency, supplements can help, but this should always be assessed by a healthcare professional.