Illness & Symptoms
Thrush
Is this your child's symptom?
- A yeast infection of the mouth in young babies
 - White patches in the front of the mouth
 
- If NOT, try one of these: 
 - Mouth Ulcers
 
Symptoms of Thrush
- White, odd shaped patches in the mouth
 - Coats the inner cheeks or inner lips
 - Sometimes also coats the tongue
 - Sticks to the mouth. It can't be washed away or wiped off easily like milk curds.
 - Sometimes causes a painful mouth, decreased sucking and reduced milk intake
 - Mild discomfort or no symptoms in most newborns
 - The infant is bottle-fed or breast-fed
 
Cause of Thrush
- Caused by a yeast (called Candida)
 - Occurs on parts of the mouth involved with sucking
 - Made worse by friction from too much time sucking on a pacifier
 
White Tongue Alone: Not Thrush
- If a white tongue is the only finding, it's not due to thrush.
 - A milk diet often causes a white coated tongue.
 - This is normal.
 - It will go away after your baby starts eating solid foods.
 - If white patches occur inside the lips or cheeks, call your child's doctor. It's safe to call during office hours.
 
When to Call for Thrush
 Call Doctor or Seek Care Now
  |  
  Contact Doctor Within 24 Hours
 Contact Doctor During Office Hours
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Call Doctor or Seek Care Now
- Dehydration suspected. No urine in more than 8 hours, dark urine, very dry mouth and no tears.
 - Age less than 1 month old and looks or acts abnormal in any way
 - Your child looks or acts very sick
 - You think your child needs to be seen, and the problem is urgent
 
Contact Doctor Within 24 Hours
- Fever occurs
 - Bleeding in the mouth
 - Drinking less than normal
 - You think your child needs to be seen, but the problem is not urgent
 
Contact Doctor During Office Hours
- Thrush, but none of the symptoms above. Reason: may need a prescription medicine to treat it.
 - You have other questions or concerns
 
Care Advice for Thrush
What You Should Know About Thrush:
- Thrush is common during the early months of life.
 - It's caused by a yeast infection in the mouth. Most often, it's due to prolonged sucking.
 - Thrush causes only mild discomfort. It's easy to treat at home.
 - Here is some care advice that should help until you call your doctor.
 
Anti-Yeast Medicine (Prescription):
- Your doctor will probably prescribe an anti-yeast liquid medicine. Use it as follows:
 - Age Under 1 Month: use 1 mL.
 - Age Over 1 Month: use 2 mLs.
 - Place in the front of the mouth on each side. Also, put it wherever you see the thrush. It doesn't do any good once it's swallowed.
 - Do this 4 times per day.
 - If the thrush isn't getting better, rub the medicine directly on the thrush. Use a cotton swab to do this.
 - Don't feed your baby anything for 30 minutes after the medicine.
 - Keep this up for at least 7 days. Also, continue it until all thrush has been gone for 3 days.
 
Decrease Sucking Time to 20 Minutes per Feeding:
- Reason: too much sucking can irritate the lining of the mouth. This makes it more prone to a yeast infection. A common example of this is when a baby sleeps with a bottle.
 - For severe mouth pain with bottle feeding, don't use a bottle. Reason: the nipple can make pain worse.
 - Try giving fluids in a cup, spoon or syringe instead.
 
Limit Pacifier Use:
- Too much sucking on a pacifier can irritate the mouth.
 - Limit pacifier use to times when nothing else will calm your baby.
 - If your infant is using an orthodontic pacifier, switch to a smaller, regular one. Reason: bigger ones can cause more friction in the mouth.
 - Special washing or boiling of pacifiers or bottle nipples is not needed or helpful.
 
Special Washing of Pacifiers and Nipples - Not Helpful:
- Pacifiers and bottle nipples can be washed the usual way with soap and water.
 - They do not need to be boiled or sterilized.
 - They do not need to be thrown out.
 - Yeast is a germ that is found in normal mouths.
 - It only causes thrush if the lining of the mouth is irritated or damaged.
 - Get better results by reducing nipple time and pacifier time.
 - Note: follow your doctor's advice if it is different.
 
Breastfeeding and Sore Nipples:
- If the mother's nipples are red and sore, it might be a yeast infection.
 - Some mothers will need treatment with an oral anti-yeast medicine (such as Diflucan). Call your PCP or OB within 24 hours for advice.
 
Diaper Rash Treatment:
- If there's a bad diaper rash, it can also be due to yeast.
 - Use an anti-yeast cream (such as Lotrimin AF) on the diaper rash.
 - No prescription is needed.
 - Put it on 2 times per day.
 - See Diaper Rash care guide.
 
Return to Child Care:
- Thrush cannot be spread to others, since it does not invade normal skin.
 - Your child can go to child care with thrush.
 
What to Expect:
- With treatment, thrush usually clears up in 4 to 5 days.
 - Without treatment, it clears up in 2-8 weeks.
 
Call Your Doctor If:
- Starts drinking less than normal
 - You think your child needs to be seen
 - Your child becomes worse
 
Remember! Contact your doctor if you or your child develop any "Contact Your Doctor" symptoms.
Disclaimer: this health information is for educational purposes only. You, the reader, assume full responsibility for how you choose to use it.
Copyright 2000-2025 Schmitt Pediatric Guidelines LLC.
Reviewed: 5/1/2025 Updated: 3/4/2025

