If you’re breastfeeding and notice your nipples are suddenly sore, red, or burning after weeks of pain-free feeding, thrush might be to blame. And if your baby has white patches in their mouth or seems fussier than usual during feeds, there’s a good chance you’re both dealing with it at the same time. That’s more common than most parents realize. The good news is that nursing with thrush is very treatable, and you don’t have to push through it alone.
This guide walks you through what thrush is, how to recognize it in yourself and your baby, and what you can do to find relief.
What Is Thrush?
Thrush, also called oral candidiasis, is a yeast infection caused by an overgrowth of Candida, a fungus that naturally lives on the skin and in the body. It thrives in warm, moist environments, which is why it often shows up in a baby’s mouth, in the diaper area, and on the nipples or breasts of nursing parents.
Thrush is especially common in newborns, toddlers, and nursing parents. Because it can pass back and forth between you and your baby during feeds, it’s important to treat both of you at the same time.
What Causes Thrush in Babies and Nursing Parents?
Candida is always present on the skin and in the body in small amounts. Problems arise when it grows out of balance. A few things can tip the scales toward an overgrowth:
- Recent antibiotic use, which can disrupt the natural balance of bacteria and yeast
- Frequent pacifier use without proper sterilization
- Bottle fed babies where the bottles aren’t sterilized
- A weakened immune system
Babies may also be at higher risk if they had a very low birth weight, or if the birthing parent had an active yeast infection at the time of delivery.
Signs of Oral Thrush in Newborns
Spotting thrush early makes treatment easier. So what does thrush look like in newborns? Here’s what to look for:
- White or yellow patches inside the mouth, on the tongue, gums, or inner cheeks, surrounded by redness
- Patches that don’t wipe away easily (this helps distinguish thrush from ordinary milk residue)
- A diaper rash with raised, red borders or a rash that is mostly in the crease folds (note that diaper rash on its own doesn’t mean thrush is present)
- Increased fussiness, especially during or after feeding
- Refusing to feed or pulling off the breast frequently
- Cracked skin at the corners of the mouth
When checking for oral thrush, a white coating on the tongue by itself, especially if your baby is feeding normally, is often just milk residue. Thrush is more likely when thick white patches appear on the tongue as well as the gums, inner cheeks, or roof of the mouth, and the patches do not easily wipe away.
Symptoms of Thrush From Breastfeeding
Because different areas of the body are involved, nursing parents and babies often experience different symptoms. Symptoms of thrush from breastfeeding include:
- Sore or cracked nipples that develop after a period of comfortable, pain-free breastfeeding
- Deep, burning, or shooting pain in the breast during or after a feeding
- Nipple or breast pain even when positioning and latch are correct
- Pain while pumping with a properly fitted pump
- Redness or a deep pink color around the nipple or areola
- A current or recurring history of vaginal yeast infections
Is Thrush Contagious Between You and Your Baby?
Yes, thrush can pass back and forth during breastfeeding, which is exactly why treating both of you at the same time is the most effective approach. A few simple habits can also help reduce the risk of reinfection:
- Wash your hands thoroughly before and after touching your nipples, your baby’s mouth, or the diaper area
- Sanitize anything that comes into contact with your nipples or your baby’s mouth, including pump parts, pacifiers, bottle nipples, and teething toys. Boil for 20 minutes or soak in a vinegar and water solution for 30 minutes
You may also wonder if it is safe to nurse or pump milk for your baby. Research suggests that once treatment begins, breastfeeding is safe and fresh, refrigerated, or frozen breast milk can generally be used safely. That said, check with your provider about what’s right for your specific situation.
How Long Does Thrush Last?
A mild case may clear on its own within a few days, but in most cases, thrush won’t resolve without treatment. With antifungal medication, thrush typically clears up within one to two weeks. It’s important to complete the full course of treatment, even if symptoms improve early, so the infection doesn’t return.
If symptoms persist beyond two weeks despite treatment, contact your provider.
Treatments for Thrush
The most effective treatments for thrush involve antifungal medications prescribed by your provider. Your provider will treat both you and your baby at the same time to break the cycle of reinfection. In addition to medical treatment, there are some supportive steps you can take at home.
Breast Thrush Remedies at Home
In addition to prescription antifungal medication, these supportive steps may offer some relief while you heal:
- Wear loose clothing to increase the airflow around your nipples
- Keep your breasts and nipples dry throughout the day
- Air-dry nipples after feeding when possible
- Wear cotton bras, and wash them in hot water with bleach to kill yeast
- Limit alcohol, sugar, bread, cheese, and honey, all of which promote yeast growth
- Sanitize all items that contact your nipples or your baby’s mouth throughout treatment
When to Contact Your Provider
A mild case in an otherwise healthy baby may resolve with treatment at home. Reach out to your provider if you or your baby experience any of the following:
- Symptoms get worse, don’t start to improve after a few days of treatment, or persist after 14 days after treatment
- Your baby stops feeding or is taking significantly less than usual
- Your baby is under three months old and develops any fever
- You have concerns about what you’re seeing. You know your baby best.
If you’re breastfeeding, both you and your baby will be treated together. Don’t hesitate to reach out even if you’re not sure whether what you’re seeing is thrush. A quick visit with your provider can bring clarity and get relief started sooner.
Share anything you like to tell nursing parents when they call about possible thrush, or why treating both parent and baby at the same time makes such a difference.
Thrush is one of those things that’s a lot easier to get through with good support. If you’re navigating nursing with thrush and want guidance from a provider who knows your family, we’re here. Contact Families First Pediatrics to schedule a visit at any of our nine Salt Lake County locations, or reach out anytime with questions.
Sources
University Hospitals: Thrush Infection in Breastfeeding Mother and Infant
Cedars-Sinai Health Library: Thrush (Oral Candida Infection) in Children
USDA WIC Breastfeeding Support: Plugged Ducts, Mastitis, and Thrush
NHS: Thrush and Breastfeeding
University of Rochester Medical Center: Treating Yeast While Breastfeeding
Cleveland Clinic: Thrush
Parents: Home Remedies for Thrush in Babies
