Have you ever noticed a persistent metallic taste in your mouth, similar to iron or rust? Although it may seem like a one-off issue, in many cases this symptom can be a sign of an oral health problem or general medical condition that deserves attention.
At A2 Dental Mallorca, we explain why a metallic taste occurs, when you should be concerned, and the role of good oral hygiene and regular dental check-ups in preventing and treating it effectively.
What is a metallic taste in the mouth and why does it happen?
A metallic taste in the mouth, known medically as dysgeusia, is a taste disorder that causes a persistent metallic or bitter taste, even when you haven’t eaten or drunk anything unusual.
It can be temporary (for example, after a deep cleaning or due to medication) or chronic, if it lasts for several days or weeks. In the latter case, it is advisable to consult a specialist.
Most common causes of a metallic taste in the mouth
1. Plaque and tartar build-up
One of the most frequent causes is poor oral hygiene. Bacterial plaque, especially in hard-to-reach areas, can release sulphur compounds that alter the taste in the mouth.
In more advanced cases, if gingivitis or periodontitis is present, this unpleasant taste is also common.
2. Bleeding gums
Inflamed or bleeding gums can leave a slight metallic taste due to the presence of blood. This is a clear sign of gingival inflammation and requires professional attention.
3. Oral infections
Infections such as abscesses, deep cavities or periodontal infections can release compounds that alter taste. They are often accompanied by bad breath or localised pain.
4. Medications
Some medications—such as antibiotics, antihypertensives, or anxiety treatments—can cause dysgeusia as a side effect. If this is the case, you should inform your doctor or dentist.
5. Dry mouth (xerostomia)
A lack of saliva reduces the mouth’s natural cleaning effect, encouraging bacterial growth and unpleasant tastes. This may be related to stress, medications or systemic problems.
6. Nutritional deficiencies or systemic diseases
Deficiencies in vitamins (such as B12), diabetes, hormonal changes, or kidney or liver disorders can also lead to a metallic taste as a secondary symptom.
When should a metallic taste be a concern?
Although it’s often temporary, you should see your dentist if the metallic taste lasts longer than 48–72 hours or appears alongside other symptoms such as:
- Swollen or bleeding gums
- Toothache or sensitivity
- Persistent bad breath
- Dry mouth or burning sensation
- Ulcers or lesions in the mouth
Early diagnosis can prevent more serious complications.
The importance of oral hygiene in prevention
One of the most effective ways to prevent metallic taste related to the mouth is to maintain a strict oral hygiene routine:
- Brush your teeth at least twice a day with fluoride toothpaste
- Use dental floss or interdental brushes daily
- Rinse with a suitable mouthwash, as recommended by your dentist
- Schedule a professional cleaning every 6 months to remove tartar
- Don’t forget to brush your tongue, where many bacteria accumulate
Seeing your dentist: key to a healthy mouth and fresh taste
In many cases, a metallic taste is a sign that something isn’t right with your oral health. Visiting your dentist regularly allows you to:
- Detect and treat oral infections before they worsen
- Monitor gum health and prevent progression of periodontal disease
- Assess for bruxism or faulty restorations that may cause discomfort
- Receive guidance on hormonal, nutritional or medication-related issues that affect your mouth
At A2 Dental Mallorca, we carry out a full assessment to identify the origin of the symptom and apply the most suitable treatment, from a deep clean to medical follow-up if necessary.
Have you noticed a metallic taste in your mouth? Don’t ignore it
A metallic taste could be your body’s way of alerting you to improve your oral care. At A2 Dental Mallorca, we help you regain your oral well-being with preventive and personalised treatments.
Book a free check-up and we’ll answer all your questions with the care and professionalism that define us.