What's Causing This Bitter Taste In My Mouth? - Healthline

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What Causes a Bitter Taste in the Mouth?

Medically reviewed by Darragh O'Carroll, MD — Written by Donna Christiano — Updated on April 18, 2023

Signs
Causes
Home remedies
Treatment
Takeaway

You may get a bitter taste in your mouth after eating certain foods. Drinking a lot of water and practicing oral care may help it go away. But having a bitter taste in your mouth can also occur with certain health conditions.

woman sticks out tongue and closes eyes while wearing headphones by a body of water — Westend61/Getty Images

Having a bitter taste in your mouth while you’re consuming something bitter, like chicory or black coffee, is expected.

Having a chronic bitter taste in your mouth, regardless of what you’re eating or drinking, could indicate one of several health conditions.

Read on to learn more about the causes of a bitter taste in the mouth, when you should seek help, and how you can get rid of this symptom.

Signs and symptoms

Not sure if you’re experiencing a bitter taste that’s the sign of something abnormal? There are a number of signs that you’re experiencing a chronic bitter taste.

You’re experiencing a strange taste throughout the day

If you’ve started to notice a strange taste in your mouth that lasts throughout the day, regardless of what you eat, it’s probably best to speak with a doctor or a dentist.

The bitter taste may be:

salty
metallic
rancid

The bitter taste in your mouth is distracting

If the bitterness in your mouth has become distracting, this is another sign that the taste is abnormal. A strong, bitter taste may distract you as you complete everyday tasks, and it may even distract you from the taste of your food as you eat.

The bitter taste remains after brushing your teeth

One of the biggest signs that the bitter taste in your mouth is a chronic condition is that the taste lingers after you brush your teeth.

Sometimes you may be left with a metallic or bitter taste in your mouth after eating or drinking something. However, if the taste doesn’t go away after brushing your teeth, it may be a sign of an underlying issue.

Causes

Having a bitter taste in your mouth is often not a serious problem, but it can interfere with your daily life and affect your diet.

Burning mouth syndrome

As the name implies, burning mouth syndrome causes a burning or scalding sensation in the mouth that can be very painful. These symptoms can occur in one part of the mouth or all over the mouth. It can also produce a feeling of dry mouth and a bitter or metallic taste.

According to the American Dental Association, burning mouth syndrome occurs in women and men, especially those who are going through menopause and beyond.

Sometimes, burning mouth has no identifiable cause. Doctors suspect it may be due to damage to the nerves in the mouth. It may also be linked to underlying conditions or treatments for conditions, like diabetes mellitus, cancer treatment, and hormonal changes during menopause.

Pregnancy

The hormone estrogen, which fluctuates during pregnancy, can also alter taste buds. Many people report a bitter or metallic taste in their mouths when they’re pregnant. This usually resolves sometime later in the pregnancy or after giving birth.

Dry mouth

The feeling of dry mouth, also known as xerostomia, can be caused by a decrease in salivary production or change in the makeup of saliva. The decrease can happen for a number of reasons, including:

aging
certain medications
an autoimmune disease, such as Sjögren syndrome, which causes excessive dryness in the mouth and eyes
tobacco smoking

Without proper saliva production, taste can be altered. Things may taste more bitter, for example, or less salty. In addition, lack of saliva can make swallowing or speaking hard, and people with this condition might notice more cavities and gum infections.

Acid reflux

Acid reflux, also called GERD, occurs when the lower esophageal sphincter weakens and allows food and stomach acid to move from your stomach upward into the esophagus and mouth.

This is likely the most common cause of a bitter taste in the mouth.

The lower esophageal sphincter is a muscle at the bottom of the esophagus, which is the tube that takes food from the mouth to the stomach. Since this food contains digestive acid and enzymes, it can lead to a bitter taste in your mouth.

Other symptoms include:

burning in the chest a few hours after a meal
problems swallowing
a chronic dry cough

Medications and supplements

Once your body has absorbed certain types of medication, remnants of the medication are excreted into the saliva. Additionally, if a medication or supplement has bitter or metallic elements, it can leave a bitter taste in your mouth.

Common culprits are:

tetracycline, an antibiotic
lithium, which is used to treat some psychiatric disorders
certain heart medications
vitamins and supplements that contain zinc, chromium, or copper

Illnesses and infections

When you have a cold, sinus infection, or other illness, your body naturally releases a protein made by different cells in the body to promote and mediate inflammation. It’s thought that this protein can also affect the taste buds, causing increased sensitivity to bitter tastes when you’re sick.

Cancer treatments

Radiation and chemotherapy can irritate the taste buds, causing many things, including water, to take on a metallic or bitter taste.

Pine nut syndrome

While not an allergy, some people can have a reaction to pine nuts that leaves a bitter or metallic taste in the mouth that usually appears 1 to 3 days after ingesting the nuts, and can last for several weeks.

Scientists aren’t exactly sure why this happens, but they suspect it may have something to do with a contaminant, such as any of the chemicals used in the shelling process, a genetic predisposition, or the nut’s oil becoming rancid.

Home remedies

There are some things you can do at home to help relieve and even prevent a bitter taste in your mouth:

Drink plenty of fluids, and chew on sugar-free gum to help increase saliva production.
Practice good dental hygiene. Gently brush for 2 solid minutes twice a day, and floss daily. See your dentist every 6 months for checkups.
Reduce your chances of experiencing acid reflux by maintaining a moderate weight, avoiding spicy or fatty foods, not smoking tobacco products, limiting alcohol, and eating small, frequent meals rather than large ones. The herb slippery elm can help increase mucous secretions, which work to shield the GI tract luminal lining from stomach acid irritation.
Ask your doctor to switch your medications if you notice one is giving you a bitter taste.

Shop for slippery elm now.

Treatment

Long-term treatment will depend on what’s causing you to experience the bitter taste. Your doctor will first ask about your symptoms, go over your medical history and the medications you take, and then perform a physical exam.

Your doctor may order lab work to test for underlying conditions, like diabetes mellitus.

Treatment will depend on the underlying condition or other culprit that’s causing the bitter taste.

For example, if acid reflux is causing the bitter taste, your doctor may advise over-the-counter or prescription antacids. If type 2 diabetes mellitus is the issue, your doctor may prescribe a drug like metformin (Glucophage). Metformin decreases the amount of sugar (glucose) the liver produces.

If certain medications you take are known to cause a bitter taste, your doctor may be able to prescribe something different.

Your health care professional may also refer you to:

a dentist if they suspect the bitter taste is linked to a dental issue
an endocrinologist if it’s associated with a disease, like diabetes mellitus
a rheumatologist if it’s thought you may have Sjögren syndrome

Takeaway

Having a bitter taste in your mouth, even when you’re not eating or drinking anything bitter, is a fairly common problem. Most causes are treatable.

Once you and your doctor determine why you have a bitter taste in your mouth, and you begin treatment, your taste buds should revert to usual with no long lasting effects.

How we reviewed this article:

SourcesHistoryHealthline has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical journals and associations. We only use quality, credible sources to ensure content accuracy and integrity. You can learn more about how we ensure our content is accurate and current by reading our editorial policy.

Burning mouth syndrome [Fact sheet]. (2005).http://www.ada.org/~/media/ADA/Publications/Files/patient_53.ashx
Ehrlich SD. (2014). Slippery elm.https://icahealth.com/wp-content/uploads/Ehrlich_Slippery-Elm.pdf
Villa A, et al. (2014). Diagnosis and management of xerostomia and hyposalivation.https://www.dovepress.com/diagnosis-and-management-of-xerostomia-and-hyposalivation-peer-reviewed-fulltext-article-TCRM
What are taste buds [Fact sheet]. (n.d.).https://kidshealth.org/en/kids/taste-buds.html
Risso DS, et al. (2015). A potential trigger for pine mouth: a case of a homozygous PTC taster.https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4684458/

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Medically reviewed by Darragh O'Carroll, MD — Written by Donna Christiano — Updated on April 18, 2023

What's Causing This Bitter Taste In My Mouth? - Healthline

Signs and symptoms

You’re experiencing a strange taste throughout the day

The bitter taste in your mouth is distracting

The bitter taste remains after brushing your teeth

Causes

Burning mouth syndrome

Pregnancy

Dry mouth

Acid reflux

Medications and supplements

Illnesses and infections

Cancer treatments

Pine nut syndrome

Home remedies

Treatment

Takeaway

How we reviewed this article:

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