Oral thrush is treated with antifungal medications, most commonly fluconazole taken by mouth for 7 to 14 days. Mild cases can sometimes be managed with topical antifungals that you swish around your mouth, while more stubborn infections require a systemic pill that works throughout your body. The right approach depends on the severity of your infection and your overall health.
First-Line Treatment for Adults
The standard treatment is fluconazole, a pill you take once daily. The typical regimen starts with a 200-milligram loading dose on the first day, then drops to 100 to 200 milligrams daily for at least two weeks. Most people notice improvement within a few days, but finishing the full course is important to prevent the infection from bouncing back.
For milder cases, your provider may recommend a topical option instead. Clotrimazole lozenges (dissolved in the mouth five times a day) and nystatin oral suspension (swished around the mouth four times daily) both work by attacking the fungus directly on the surface of your mouth and tongue. These are less convenient because of the frequent dosing, but they avoid the systemic side effects that come with a pill.
A third option is a miconazole tablet that sticks to your gum. You press it against the upper gum once daily and let it dissolve slowly throughout the day. It delivers antifungal medication right where the infection lives without needing to swallow anything.
Treatment for Babies and Infants
Thrush is common in newborns, and the go-to treatment is nystatin oral suspension. The standard infant dose is 2 milliliters (about half a teaspoon) four times a day. You use the dropper to place half the dose on each side of the baby’s mouth, then avoid feeding for 5 to 10 minutes so the medication has time to coat the affected areas. Premature or low-birth-weight infants typically need a smaller dose of 1 milliliter four times daily.
Treatment should continue for at least 48 hours after the white patches disappear. Stopping too early is one of the most common reasons thrush comes back in babies. If your infant uses a pacifier or bottle, sterilize those items daily during treatment to avoid reintroducing the fungus.
A Note on Breastfeeding
It was long believed that thrush in a baby could cause a yeast infection on the mother’s nipples, leading many providers to prescribe antifungal creams for both mother and baby simultaneously. More recent evidence challenges this. Cleveland Clinic notes there is no solid evidence that yeast infections cause the nipple pain and itching traditionally blamed on them. Applying antifungals when yeast isn’t the actual cause can irritate the nipple and worsen symptoms. If you’re experiencing nipple pain while nursing a baby with thrush, your provider may recommend a topical steroid or another targeted treatment rather than an antifungal.
Saltwater Rinses and Supportive Care
While antifungals do the heavy lifting, a simple saltwater rinse can help manage discomfort. The Mayo Clinic recommends dissolving about half a teaspoon of salt in one cup of warm water, swishing it around your mouth, and spitting it out. You can do this several times a day between meals. It won’t cure the infection on its own, but it helps keep the mouth clean and can soothe the soreness that makes eating uncomfortable.
A few other practical steps make a difference during an active infection:
- Use a soft toothbrush. The white patches in thrush can be raw underneath, and aggressive brushing irritates them further. Replace your toothbrush once the infection clears.
- Rinse after using an inhaler. Steroid inhalers for asthma are a well-known thrush trigger. Rinsing your mouth with water after every puff helps wash away residual medication that encourages fungal growth.
- Keep dentures clean. Remove them every night, brush all surfaces with a separate toothbrush, and soak them in a denture cleanser or plain water overnight. Fungus thrives on denture surfaces, and poor cleaning is a major reason thrush recurs in older adults.
Diet and Probiotics
Sugar doesn’t cause thrush on its own, but it can feed the fungus once an infection takes hold. Research links high intake of refined sugar, simple carbohydrates, and ultraprocessed foods with increased Candida growth. During an active infection, cutting back on sugary drinks, alcohol (especially beer and wine), and heavily processed snacks may help your body clear the infection faster alongside antifungal treatment.
Probiotics show genuine promise as a complement to standard treatment. A systematic review found that certain strains of Lactobacillus and Bifidobacterium reduced Candida levels significantly compared to placebo groups. In one study, participants using a probiotic capsule applied to the upper denture daily for five weeks had a Candida detection rate of just 16.7%, compared to 92% in the placebo group. These beneficial bacteria appear to work by competing with Candida for space, producing acids and other substances that suppress fungal growth, and stimulating the immune system. Probiotic lozenges, yogurt, and certain cheeses have all shown benefit in studies, though the strongest effects come from products specifically formulated with high probiotic counts rather than standard grocery store yogurt.
What Happens if Thrush Goes Untreated
In otherwise healthy adults, untreated thrush is uncomfortable but rarely dangerous. It can make eating painful, alter your sense of taste, and linger for weeks. The bigger concern is for people with weakened immune systems, including those with HIV, people undergoing chemotherapy, and those on long-term immunosuppressive medications. In these groups, the infection can spread down the throat into the esophagus, a condition called Candida esophagitis. This causes difficulty swallowing, pain when food passes through the throat, and a sensation of food getting stuck. Esophageal involvement requires stronger systemic antifungal treatment and can’t be managed with topical options alone.
How Thrush Is Diagnosed
In most cases, a healthcare provider can diagnose oral thrush just by looking inside your mouth. The characteristic white, cottage cheese-like patches on the tongue, inner cheeks, and roof of the mouth are distinctive enough for a visual diagnosis. Occasionally, if the diagnosis is uncertain or the infection isn’t responding to treatment, a small sample may be taken from the mouth and examined under a microscope to confirm the presence of Candida. This is more common in people with recurring infections or those who aren’t improving with standard antifungals, as it can help identify resistant strains or alternative diagnoses.
Preventing Recurrence
Thrush has a frustrating tendency to come back, especially if the underlying conditions that encouraged it haven’t changed. The most common triggers are antibiotic use (which kills the bacteria that normally keep Candida in check), steroid inhaler use, dry mouth, poorly fitting or unclean dentures, and a weakened immune system. Addressing these root causes matters more than any single treatment.
If you wear dentures, nightly removal and thorough daily cleaning is the single most effective preventive step. If you use a steroid inhaler, rinsing your mouth after every use becomes a permanent habit, not just something to do during an infection. For people with diabetes, keeping blood sugar well controlled reduces the glucose available to Candida in saliva. And if you’ve needed multiple rounds of antibiotics, adding a probiotic during and after the antibiotic course may help maintain the oral bacterial balance that keeps yeast from overgrowing.