What Causes A Metallic Taste When Coughing? - Healthline

Maybe your like

HealthlineSubscribeWhat Causes a Metallic Taste When Coughing?

Medically reviewed by Angelica Balingit, MD — Written by Evan Porter — Updated on March 3, 2025

Causes
When to see a doctor
Treatment
Takeaway

Your cough can taste bad for many reasons. When a metallic taste is paired with coughing, you may have an upper respiratory infection like a cold. This can cause your phlegm to contain traces of blood.

Repeatedly coughing up phlegm often brings small amounts of blood into the mouth and onto the taste buds, leading to a distinct metallic taste in your mouth.

While this symptom often indicates that you’re experiencing a common cold, there are other possible causes to consider.

Possible causes of a metallic taste when coughing

A metallic taste when coughing can be alarming, but it doesn’t always signal a medical emergency.

Upper respiratory infection

An upper respiratory infection is a viral infection that passes from one person to another, irritating the nose, throat, and lungs.

It often comes with congestion and a nagging cough. The phlegm, mucus, and discharge from the infection can have a metallic taste that enters your mouth when you cough.

The cold is an extremely common upper respiratory infection. According to the Centers for Disease Control and Prevention (CDC), it affects average adults around two to three times per year and children even more often.

Another upper respiratory infection that can cause a metallic taste when coughing is a sinus infection.

Other upper respiratory infections, such as sore throat and strep throat, aren’t usually associated with a cough, so they don’t normally cause a metallic taste.

Exercise-induced pulmonary edema

Intense exercise can increase the pressure in the chest, which can push fluid into the lungs, causing a condition known as exercise-induced pulmonary edema.

Red blood cells in the fluid can enter into the lungs. When these are coughed up into the mouth, they bring with them a metallic taste.

Asthma or trouble breathing due to exercise

For people with trouble breathing due to asthma, or anyone new to intense exercise, a metallic taste along with wheezing or coughing can sometimes occur when breathing becomes difficult.

Anaphylaxis

Anaphylaxis is a severe and intense reaction to an allergen. It can occur either immediately or shortly after contact with an allergen. The affected person goes into shock as their immune system struggles to fight it off.

These kinds of allergic reactions can sometimes be prefaced with a metallic taste in the mouth as the airways begin to restrict, causing wheezing and coughing.

When to see a doctor

A common cold will often run its course in a few days, but there are a few key warning signs you should keep in mind. See a doctor if, along with a metallic taste in your mouth, you have the symptoms below:

Long-lasting or high fever

A low-grade fever is a common symptom of an upper respiratory infection, but you should go to the doctor or hospital immediately if your fever spikes to 103°F (39.4°C) or higher.

Additionally, seek medical attention if a fever lasts more than 5 days.

Coughing up blood

A small amount of blood in the phlegm or mucus you cough up during a cold is normal.

A little bit of blood in your phlegm will make the phlegm look red or pink, and it usually means that the frequent coughing has irritated your respiratory tract. As an upper respiratory infection progresses, your phlegm may become more yellow or green.

Coughing up large, visible amounts of blood, however, could be a sign of a serious condition, such as:

chronic bronchitis
lung cancer
pneumonia
pulmonary embolism, which is a blood clot in the lungs
tuberculosis

Wheezing or trouble breathing

If your cough is so severe that you have trouble breathing, seek immediate medical attention. Difficulty breathing could be a sign that your airways are narrowing due to a serious medical condition such as:

a severe asthma attack
anaphylactic shock
heart attack
pulmonary embolism

Treatments for a metallic taste when coughing

If your cough with a metallic taste is caused by a common cold, there are few treatment options. The virus needs to run its course.

However, you can treat some of the symptoms of a common cold with these medications:

Pain relievers: If your upper respiratory infection has left you achy or with a sore throat, over-the-counter (OTC) pain relievers such as acetaminophen (Tylenol) or ibuprofen (Advil, Motrin) may help temporarily relieve the discomfort.
Decongestants: Coughing up large amounts of phlegm and mucus can lead to a metallic taste in your mouth. One way to treat this is to reduce the amount of congestion you’re experiencing. Consider short-term use of an OTC decongestant such as oral pseudoephedrine or nasal spray with oxymetazoline. Note that decongestants are not suitable for persons with certain conditions, such as hypertension and heart disease.
Cough medication: A cough suppressant may help with your cold symptoms and the metallic taste. Dextromethorphan (Delsym, Robitussin) is a common and easily available option for reducing a stubborn cough.

If you have asthma, you may be able to manage your cough with prescription medications and an inhaler or nebulizer.

Anaphylaxis is an emergency symptom. Anyone who experiences coughing as a result of anaphylaxis should be taken to an emergency room, or someone should call 911 or their local emergency services on their behalf.

However, until the emergency medical assistance is available, auto-injectors (such as the EpiPen) can be used to administer a lifesaving dose of epinephrine. Epinephrine shouldn’t be administered to people who don’t have a prescription for it.

Takeaway

Most people who taste metal in their mouth when coughing are simply experiencing a common cold or upper respiratory infection. Coughing up phlegm (which can have varying amounts of blood in it) can trigger a metallic taste.

However, a cold isn’t the only possible cause. See a doctor immediately if you suspect the taste isn’t coming from congestion and coughing. Keep an eye out for other symptoms such as:

a very high fever
coughing up blood
trouble breathing

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.

4 tell-tale signs you have strep throat. (2018).https://healthcare.utah.edu/the-scope/health-library/all/2018/07/4-tell-tale-signs-you-have-strep-throat
About common cold. (2024).https://www.cdc.gov/common-cold/about/
Anaphylaxis. (n.d.).https://www.aaaai.org/conditions-treatments/allergies/anaphylaxis
Crozer Health. (2018). What the color of your phlegm could be telling you [Press release].https://www.crozerhealth.org/news/news-releases/2018/what-the-color-of-your-phlegm-could-be-telling-you
DeGeorge KC, et al. (2019). Treatment of the common cold.https://www.aafp.org/pubs/afp/issues/2019/0901/p281.html
Food allergies: Anaphylactic reactions (anaphylaxis). (2023).https://www.ncbi.nlm.nih.gov/books/NBK453101
Metallic taste. (2023). https://www.nhs.uk/conditions/metallic-taste

Share this article

Medically reviewed by Angelica Balingit, MD — Written by Evan Porter — Updated on March 3, 2025

Health Conditions

Condition Spotlight

Wellness Topics

Product Reviews

Featured Programs

Featured

Lessons

Newsletters

Lifestyle Quizzes

Health News

This Just In

Top Reads

Video Series

Find Your Bezzy Community

Follow us on social media