White Curd on the Palate and a Taste She Could Not Get Rid Of

Quick answer: Oral thrush is a fungal overgrowth, and in adults it almost always has a cause worth finding — a steroid inhaler used without rinsing, a denture worn overnight, dry mouth, antibiotics, or uncontrolled diabetes. Treating the fungus without addressing the cause guarantees it comes back.

The call

Her third course of antifungal in eight months. She wanted to know why it kept coming back, which was the right question and one nobody had answered.

Shulamit, 68, from Givat Sharett, described a persistent unpleasant taste, a burning tongue, soreness under her upper denture, and a white coating she could scrape off with her tongue.

What we found

On examination: creamy white plaques on the palate, the inside of both cheeks and across the tongue. Wiped with gauze, they came away, leaving a red and slightly bleeding surface underneath. That is the distinguishing feature of pseudomembranous candidiasis and it is the opposite of the finding in a persistent white patch, which does not rub off.

Her palate under the upper denture was uniformly red, following the exact outline of the denture — denture stomatitis, which is a fungal condition rather than an allergy or a fitting problem, and which is very commonly present without any symptoms at all.

Angular cheilitis at both corners of the mouth, cracked and sore.

Then the causes, which took longer than the diagnosis and mattered more:

• A steroid inhaler for asthma, used twice daily for six years. She did not rinse her mouth afterwards, had never been told to, and used no spacer device. Inhaled steroid settling on the palate and cheeks is one of the commonest causes of recurrent thrush in adults.
• She wore her upper denture overnight, every night, and had done for eleven years. A denture worn twenty-four hours a day keeps the palate warm, moist and covered, which is precisely what the organism requires.
• The denture was cleaned with toothpaste and a brush, which does not disinfect acrylic. The fungus lives in the microscopic porosities of the denture itself, and an uncleaned denture reinfects the mouth within days of finishing any treatment.
• Dry mouth from two of her regular medications.
• Her HbA1c was raised, which came out of the letter to her doctor. Poorly controlled diabetes is a recognised cause of recurrent oral candidiasis and is worth excluding in any adult with repeated episodes.

Four causes, all correctable, none previously identified. That is why three courses of antifungal had achieved three temporary improvements.

What we did

Treated the infection, with an antifungal gel and, given the extent and the denture involvement, a systemic antifungal course arranged with her doctor. Prescribing was checked against her other medications, as some antifungals interact meaningfully with common drugs including statins and warfarin.

Then the four causes:

• Inhaler technique. Rinse the mouth with water and spit it out after every dose. A spacer device was arranged through her doctor, which reduces deposition in the mouth substantially. Two sentences of advice that should have been given six years earlier.
• The denture out at night, every night, without exception. This was the change she resisted most and it was the one that mattered most.
• Denture disinfection. Brushed with soap and water, then soaked overnight in a proper denture cleaning solution. Because hers had a metal component, the solution had to be one suitable for metal — some hypochlorite-based products corrode cobalt-chrome. That detail matters and is easy to get wrong.
• The denture was old, eleven years, worn and poorly fitting. It was remade once the infection had cleared. Treating thrush and then returning the same colonised, ill-fitting denture is a wasted course.
• Dry mouth managed with frequent water, a saliva substitute at night, and a letter to her doctor about the medications.
• The diabetes followed up by her family doctor and control improved over the following months.

The angular cheilitis was treated with a combined antifungal and antibacterial cream, and resolved fully only once the new denture restored the height of her bite. Corners of the mouth that fold in because the bite has collapsed stay wet and keep reinfecting, and no cream fixes that on its own.

The outcome

The infection cleared in two weeks and, four years on, has not returned.

She rinses after her inhaler, the denture comes out at night and sits in solution, and the new denture fits.

The single most useful thing she was given was not a prescription. It was the instruction to rinse her mouth after using her inhaler.

What to do if this happens to you

1. Rinse and spit after every steroid inhaler dose, and ask your doctor about a spacer.
2. Take dentures out overnight, every night. This is the most important change for denture wearers.
3. Soak dentures in a proper cleaning solution, not toothpaste — and check the solution suits any metal parts.
4. Ask why it keeps coming back if you have had more than one course of antifungal.
5. Ask about diabetes if thrush is recurrent and no other cause is apparent.
6. Have an ill-fitting denture remade, or the problem returns whatever else is done.

Recurrent sore mouth or thrush? Book an assessment at Ramat Beit Shemesh Urgent Dental Care — the cause is usually findable. 055-985-8845 · WhatsApp https://wa.me/972559858845 · Harav Kook 28/1, Beit Shemesh

This is a composite clinical story. It reflects a presentation we see regularly in Beit Shemesh and Ramat Beit Shemesh; the name and details are illustrative and are not those of a real patient.