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Can bad taste in mouth be serious?

Author

William Rodriguez

Published Jan 22, 2026

Bad taste in your mouth can be a sign of a serious condition. Seek prompt medical care if the bad taste in your mouth is persistent or causes you concern. Contact us at Capozzi Dental if you have any questions or concerns.

Should I be concerned if I have a weird taste in my mouth?

Occasionally having a bad taste in your mouth is totally normal. But if you've had a strange taste in your mouth for days, it could be a sign of an underlying dental or medical problem. While the most common causes may not be serious, it's best to discuss treatment with your dentist.

How do you cure a bad taste in your mouth?

Overview

  1. Gargle with water.
  2. Using toothpaste, brush your teeth, tongue, roof of your mouth, and gums at least two times a day.
  3. Rinse your mouth with mouthwash.
  4. Drink liquids, chew sugar-free gum or mints, or suck on sour candies.
  5. Use plastic utensils if you have a bitter or metallic taste when eating.

Is having a weird taste in your mouth a symptom of Covid?

Nearly 4 in 10 COVID patients experience impaired taste or total loss of taste, but dry mouth affects even more — up to 43%, according to their broad review of more than 180 published studies.

When should I be concerned about a metallic taste in my mouth?

Most of the time, a metallic taste in your mouth is temporary and harmless. But it can be a symptom of a more serious health condition, so it's a good idea to talk with your healthcare provider if the metallic taste persists or is associated with other symptoms such as allergy symptoms, pain, or any signs of infection.

45 related questions found

Why do I have a funny taste in my mouth?

The most common reasons for a bad taste in your mouth have to do with dental hygiene. Not flossing and brushing regularly can cause gingivitis, which can cause a bad taste in your mouth. Dental problems, such as infections, abscesses, and even wisdom teeth coming in, can also cause a bad taste.

What cancers cause a metallic taste in your mouth?

Metallic Taste (Dysgeusia), including bitter or sour taste, is a common side effect of lung cancers, medications and chemotherapy treatments. People who experience xerostomia (dry mouth) often also suffer from dysgeusia.

Does COVID affect your tongue?

Our observations are supported by a review of studies reporting changes to the mouth or tongue in people with COVID-19, published in December. The researchers found that having a dry mouth was the most common problem, followed by loss of taste (dysgeusia) and fungal infection (oral thrush).

What are COVID tongue symptoms?

People have reported this phenomenon, with swollen tongues and small bumps, ulcers and white patches to the ZOE COVID Study, which analyzes symptoms uploaded via an app by the British public.

Can liver problems cause bitter taste in mouth?

While rare, kidney or liver disease could cause a metallic taste to develop in the mouth due to a buildup of chemicals in the body. Once these chemicals are released into saliva, the cause a metallic taste.

Can anxiety cause a bad taste in your mouth?

Anxiety can cause a wide range of physiological symptoms, including a bitter or metallic taste in your mouth. Research has shown that there's a strong connection between taste changes and stress — perhaps because of the chemicals that are released in your body as part of the fight-or-flight response.

Can Covid give you a metallic taste in your mouth?

Some people report having a metallic taste in their mouth immediately after receiving the COVID-19 vaccine. Those that developed it described it as tasting like nickels. This side effect is very rare, however.

How do you know if you no longer have COVID?

Three full days with no fever AND no fever-reducing medicine. No coughing. No shortness of breath. At least one week has passed since symptoms started.

How long do Covid symptoms last?

How long do COVID symptoms last? Those with a mild case of COVID-19 usually recover in one to two weeks. For severe cases, recovery can take six weeks or more, and for some, there may be lasting symptoms with or without damage to the heart, kidneys, lungs and brain.

How long are you contagious with coronavirus?

According to the CDC, if you have mild to moderate COVID-19, you may be contagious for 10 days from the first day you noticed symptoms. If you were severely affected or critically ill from COVID-19, you may stay infectious for up to 20 days from the start of your symptoms.

How long does loss of taste last with COVID?

For many patients, COVID-19 symptoms like loss of smell and taste improve within 4 weeks of the virus clearing the body. A recent study shows that in 75-80% of cases, senses are restored after 2 months, with 95% of patients regaining senses of taste and smell after 6 months.

How do you get rid of metallic taste in your mouth from COVID?

Sharp/tart flavoured foods and drinks such orange, lemon, lime flavours can be useful in balancing very sweet tastes. Sucking boiled sweets and mints may also help refresh your mouth before and after eating. If foods have a metallic taste, try plastic cutlery instead of metal and use glass cookware.

Does a white tongue mean your sick?

White tongue is usually harmless and only temporary. It's most commonly caused by poor oral hygiene or candida overgrowth, but it can also be an indication of an infection or some serious conditions. White tongue is a sign that something isn't right with the body.

Can kidney problems cause metallic taste in mouth?

When the kidneys are not functioning properly, waste materials can build up in the blood. This accumulation can cause a person to experience fatigue and a metallic taste in the mouth. In addition to metallic taste and fatigue, common kidney disease symptoms may include body pain, swelling, and trouble breathing.

Why do I have a weird taste in my mouth and smell in my nose?

Digestive Problems. Conditions like acid reflux can cause bad taste in the mouth and foul smell in the nose. Other conditions that are linked to bad smell, albeit more rarely, include diabetes, liver disease, and kidney disease. Seeking treatment from a local ENT for the underlying conditions can prevent bad smell.

How long do you test positive after having Covid?

If you get COVID-19, you may test positive on a PCR test for several weeks after you have ceased to be infectious. With a rapid test, you may test positive for six or seven days after your symptoms have cleared.

Can depression cause nasty taste?

A preliminary study of 41 dental patients showed that the burning mouth symptoms of taste change and bad breath were significantly associated with having generalized anxiety, whereas having a metallic taste or a sensation of film on the gums was associated with depression.

Can depression cause bitter taste in mouth?

High stress and anxiety levels can stimulate the stress response in the body, which often alters a person's sense of taste. Anxiety can cause dry mouth, which frequently results in a bitter taste.

What are some of the common causes of taste disorders?

Some people are born with these disorders, but most are caused by:

  • Illness (for example, cold or flu, sinus infection, and allergies)
  • Head injury.
  • Hormone changes.
  • Dental or mouth problems.
  • Nasal polyps.
  • Exposure to certain chemicals.
  • Certain medicines.
  • Exposure to radiation therapy for head or neck cancer.

What illness affects your taste?

Nervous system disorders that affect the nerves of the mouth or brain, such as Parkinson's disease, multiple sclerosis (MS), and Alzheimer's disease, may cause a change in the perception of taste. In addition, some non-nervous system disorders, such as cancer, can alter taste perception – especially during treatment.