Can My Mouth Infection Hurt my Breastfed Baby?


As a new mother, you may be concerned about passing on any infections or illnesses to your baby, especially if you are currently dealing with a mouth infection. You may wonder, can my mouth infection hurt my breastfed baby? The short answer is – it depends.

What is a Mouth Infection?

A mouth infection can refer to any type of infection that affects the oral cavity, including the gums, teeth, tongue, and cheeks. This can include conditions like thrush (a yeast infection), cold sores (caused by the herpes simplex virus), and bacterial infections such as strep throat or gum disease.

Can My Mouth Infection Be Passed Through Breast Milk?

In most cases, a mouth infection cannot be passed through breast milk. This is because most bacteria and viruses that cause oral infections are not able to survive in breast milk. Additionally, your body’s natural antibodies will help protect your baby from any potential harm.

Connection Between Your Mouth Infection and Your Breastfed Baby

As a breastfeeding mom, whatever you consume directly affects your baby through breast milk. This means that if you have a mouth infection, it can also be passed on to your baby through breastfeeding. The most common mouth infections include cold sores, thrush, and gingivitis.

1-Cold Sores

Cold sores are caused by the herpes simplex virus (HSV) and usually appear as small blisters on or around the lips. If you have a cold sore outbreak while breastfeeding, it’s essential to take precautions to prevent the virus from passing on to your baby. The HSV can be transmitted through direct contact, so make sure to wash your hands thoroughly before and after breastfeeding. Also, avoid kissing your baby until the cold sore has completely healed.


Thrush is a fungal infection caused by candida albicans. It can affect both you and your baby in the form of oral thrush (white patches on the tongue or inside the mouth) or nipple thrush (painful, cracked nipples). If you have thrush, it’s crucial to treat it promptly to prevent passing it on to your baby through breastfeeding. Your doctor may prescribe antifungal medication for both you and your baby.


Gingivitis is a common gum infection caused by bacteria in plaque buildup. It can lead to swollen and bleeding gums, which can also pass on harmful bacteria to your baby through breastfeeding. If you have gingivitis, it’s essential to practice good oral hygiene and visit your dentist for treatment.

Exceptions to the Rule

While it is rare for a mouth infection to transfer through breast milk, there are a few exceptions to be aware of.


If you have been diagnosed with HIV, it is important to speak with your doctor about breastfeeding as the virus can be transmitted through breast milk.

2-Hepatitis B and C

These viruses can also be passed through breast milk if you are infected. It is important to discuss your options with your healthcare provider if you have either of these infections.

How to Protect Your Breastfed Baby from Your Mouth Infection

The good news is that there are steps you can take to prevent your mouth infection from harming your breastfed baby. Here are a few tips:

  • Practice good oral hygiene: This includes brushing your teeth twice a day, flossing daily, and using an antiseptic mouthwash.
  • Wash your hands frequently: Make sure to wash your hands before and after breastfeeding to prevent passing on any harmful bacteria.
  • Avoid close contact: If you have a cold sore outbreak, avoid kissing your baby until it has completely healed.
  • Treat your infection promptly: If you suspect that you have a mouth infection, consult your doctor for appropriate treatment. Remember to inform them that you are breastfeeding so they can prescribe safe medication.
  • Use a breast pump: If your mouth infection is severe, you may need to avoid breastfeeding temporarily. In this case, you can pump and store breast milk for your baby to consume.

Seek Medical Advice

If you are experiencing a mouth infection while breastfeeding, it’s important to seek medical advice from your doctor. They can provide proper treatment and guidance on how to minimize the risk of passing on any infection to your baby.


In most cases, a mouth infection cannot be passed through breast milk. However, it is still important to practice good hygiene and seek medical advice if you are experiencing an infection while breastfeeding. With the proper precautions and guidance, you can continue to breastfeed your baby without worrying about passing on any infections.


How can I prevent passing infections to my baby during breastfeeding?

  1. Practice good oral hygiene, including regular brushing and flossing, and seek treatment for any oral infections promptly. Also, ensure proper breastfeeding technique and maintain clean breast and nipple hygiene.

Can I continue breastfeeding if I have a mouth infection?

  1. In most cases, yes, but it’s essential to consult with your healthcare provider. They can provide guidance on how to manage the infection while minimizing the risk of transmission to your baby.

Is it safe to use medication to treat my mouth infection while breastfeeding?

  1. Certain medications may be safe for breastfeeding mothers, but it’s crucial to consult with a healthcare professional before taking any medication to ensure it won’t harm your baby.

How can I prevent recurrent mouth infections while breastfeeding?

  1. Maintain a healthy lifestyle, including a balanced diet, adequate hydration, and managing stress levels. Additionally, follow proper oral hygiene practices and attend regular dental check-ups.

Can my breast milk help protect my baby from contracting mouth infections?

  1. Breast milk contains antibodies and other immune-boosting factors that can help protect your baby from infections. However, maintaining good oral hygiene and seeking prompt treatment for any infections are still crucial.

Should I avoid kissing my baby if I have a mouth infection?

  1. It’s generally advisable to avoid direct contact, such as kissing, until the infection has cleared to prevent transmission to your baby. Opt for other forms of affection that don’t involve direct contact with your mouth.

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