Metallic Taste in Mouth During Pregnancy: Causes and Relief

Have you noticed a sudden metallic flavour every time you eat or drink? Many pregnant women experience this unusual symptom, often in the early weeks. Though it might feel uncomfortable, it’s a normal part of pregnancy and there are easy remedies to help you feel more like yourself again.

Metallic taste in the mouth during pregnancy (Dysgeusia)

Pregnancy is a journey filled with new experiences, and some are stranger than others. If you've recently noticed an odd, metallic taste in your mouth – a bit like you’ve been sucking on a coin – you’re not alone. This common and rather peculiar symptom is known as dysgeusia, but many women simply call it "metal mouth”.

Dysgeusia is the medical term for a change in taste that many mums-to-be describe as metallic, bitter, or sour. This unusual symptom is often linked to the hormonal shifts of pregnancy, especially rising levels of oestrogen and progesterone, which can affect how food tastes and even make saliva more acidic. Metallic taste is most common in the first trimester, though for some women it can continue later into pregnancy.

While it can be unpleasant, please be reassured that for the vast majority of women, dysgeusia is a completely normal and harmless part of early pregnancy. Several temporary taste disorders can arise during pregnancy, including this one.

What is behind the metallic taste?

The primary culprit is the surge of hormones that your body produces during pregnancy, particularly oestrogen, progesterone, and hCG. While these hormones are vital for supporting your pregnancy, they also affect taste and smell. This can make your taste buds more sensitive, alter how you perceive flavours, and sometimes increase saliva acidity, leaving you with a persistent metallic, sour, or even ‘penny-in-mouth’ taste. Other factors may also play a role, such as iron-rich prenatal vitamins, acid reflux, dehydration, or oral health issues.

When does the metallic taste start and end during pregnancy?

A metallic taste often shows up in early pregnancy, sometimes as soon as a week or two after conception. Because it can start so early, some women notice it before they’ve even missed a period or taken a pregnancy test. It’s most common in the first trimester, usually around weeks 4 to 6, though the timing and intensity can vary from person to person.

This symptom usually doesn’t stick around forever. For most expectant mothers, the metallic taste begins to fade towards the end of the first trimester and is often gone completely by the second trimester (usually around weeks 12 to 14). As your hormones start to settle down a bit, your sense of taste should return to normal. While a small number of women might find it lingers longer, it almost always resolves after the baby is born.

Causes of metallic taste in pregnancy

While the pregnancy hormone oestrogen is the main reason for that coiny taste, several other factors can contribute to or worsen the sensation. Here’s a more detailed look at what might be happening:

• Hormonal changes:

  • During pregnancy, the surge in hormones, especially oestrogen, directly affects your taste buds. This can increase your sensitivity to certain flavours and lead to that distinct metallic or bitter taste.

• Heightened senses:

  • Pregnancy can turn your sense of smell and taste into superpowers. This increased sensitivity can make everyday foods and smells seem much more intense, sometimes resulting in a metallic flavour.

• Morning sickness and acid reflux:

  • Nausea, vomiting, and heartburn (also known as GERD or acid reflux) are very common during pregnancy. When stomach acid comes up into your mouth, it can leave behind a sour or metallic taste.

• Prenatal vitamins and supplements:

  • The vitamins you take to support your baby are packed with minerals. Certain ones, especially those containing a high amount of iron, can leave a noticeable metallic aftertaste.

• Changes in saliva:

  • You might notice you're producing more saliva than usual, or that its composition feels different. These changes in your saliva can directly affect how you perceive taste.

• Dehydration:

  • Not drinking enough water can lead to a dry mouth and dehydration, which can concentrate the metallic taste and make it more obvious.

• Oral health issues:

  • Pregnancy can make your gums more sensitive and prone to conditions like gingivitis (gum inflammation). Any oral health issues or gum infections can sometimes contribute to an unusual taste in the mouth.

• Other illnesses:

  • Less commonly, things like allergies or respiratory infections (like a cold or sinus infection) can temporarily alter your sense of taste due to inflammation and congestion. In rare cases, underlying medical conditions can also be a factor, which is why it's always good to mention any persistent symptoms to your doctor.

If you’re experiencing persistent or uncomfortable symptoms, it’s best to speak with a healthcare professional. Request an appointment with Thomson Medical to get support throughout your pregnancy journey.

What can I do to manage the metallic taste?

While you may not be able to eliminate it completely, there are many simple and effective ways to manage and reduce the metallic taste: 

Reach for acidic foods and drinks

Acidic flavours are brilliant at cutting through the metallic taste and stimulating saliva production, which helps wash it away.

• Sip on citrus: 

  • Try adding a slice of lemon or lime to your water. Citrus juices, such as sugar-free lemonade or orange juice, can also be very refreshing.

• Enjoy citrus fruits: 

  • Oranges, grapefruits, and pineapples can help cleanse your palate.

• Try foods with vinegar: 

  • Pickles, olives, and salads with a vinaigrette dressing might become your new best friends.

Keep your mouth fresh

Good oral hygiene can make a huge difference.

• Brush frequently: 

  • Brush your teeth at least twice a day, and don’t forget to gently brush your tongue, where taste-altering bacteria can build up.

• Rinse it out: 

  • Swishing with a mild saltwater rinse (half a teaspoon of salt in a glass of warm water) or a baking soda rinse can help neutralise the pH in your mouth and get rid of the taste.

• Chew some mints: 

  • This stimulates saliva and masks the metallic flavour.

Stay hydrated

Drinking plenty of water throughout the day helps to rinse away the metallic residue and prevents dry mouth, a condition which can make the taste worse.

Switch your cutlery

This might sound strange, but if metal cutlery seems to enhance the taste, try switching to plastic, wooden, or bamboo utensils for a while.

Your vitamins

If you suspect your prenatal vitamins are the cause, don’t stop taking them. Here are some suggestions:

• Take your vitamins with a meal to reduce the aftertaste.

• Consider switching to a different brand with a lower iron content, opt for a coated tablet, or try a gummy version.

When to see a doctor or gynae

It's always best to mention any new or persistent symptoms to your doctor or gynae. You should definitely schedule a consultation if:

• The metallic taste continues past the first trimester (beyond 12-14 weeks) or seems to be getting worse.

• It's affecting your appetite to the point that you are losing weight or struggling to stay hydrated.

• You believe it’s connected to other issues like your supplements, acid reflux, or a dental problem.

• You experience other concerning symptoms alongside it, such as persistent nausea, difficulty swallowing, or you have general concerns about your nutrition.

• Your doctor can provide reassurance, investigate the cause, and ensure you and your baby are healthy and well.

FAQ

What week does a metallic taste start in pregnancy?

A metallic taste, often called dysgeusia, can begin as early as the first trimester, usually around weeks 4–6, when hormonal changes are most intense.

What are 5 warning signs of a possible problem during pregnancy?

How can I get rid of the metallic taste in my mouth while pregnant?

Should I be worried if I taste metal in my mouth?

A metallic taste is usually harmless and linked to hormonal changes. However, if it comes with other concerning symptoms like severe nausea, vomiting, or fever, consult your doctor.

What are the signs of an unhealthy baby in the womb?

Does a metallic taste in your mouth mean twins?

No. Metallic taste is a common symptom in pregnancy and is not linked to carrying twins. It is mainly caused by hormonal changes, particularly increased oestrogen and progesterone.

The information provided is intended for general guidance only and should not be considered medical advice. For personalised recommendations and tailored advice, please consult a specialist at Thomson Medical. Request an appointment with Thomson Medical today.