10956 Thrush

Overview

Thrush is a common infection caused by a type of yeast called Candida. It can affect different parts of the body, most commonly the mouth, throat, and vaginal area. In most people, it is a minor, treatable infection, but it can become more serious if you have a weakened immune system.

Yes. Most people will have thrush at some point in their lives. It is especially common in babies, older adults, and people who take antibiotics.

Thrush can affect anyone at any age, but it is more likely in babies, older people, women (vaginal thrush), people with diabetes, and those with a weakened immune system.

Symptoms

Common symptoms

• White patches on the tongue, inner cheeks, or roof of the mouth that may wipe away but can bleed
• Soreness, redness, or a burning feeling in the mouth
• A dry ‘cottony’ feeling in the mouth or loss of taste
• If vaginal thrush: itching, soreness, swelling around the vagina, and a thick white discharge
• Pain during sex or when passing urine if vaginal thrush is present
• A red, itchy rash in warm skin folds such as under the breasts, armpits, or groin

Symptoms in children

• White patches inside the mouth that look like cottage cheese
• Cracked skin at the corners of the mouth
• Irritability, fussy feeding, or a white coating on the tongue that does not wipe away
• A nappy rash that does not clear with usual nappy creams

Symptoms in older adults

• Redness and soreness under dentures
• Difficulty swallowing or feeling like food is stuck in the throat
• Dry mouth or altered sense of taste
• A cracked, sore tongue or cracked corners of the mouth

Causes

Main causes

• An overgrowth of Candida yeast, which normally lives on the skin and inside the mouth, gut, and vagina in small amounts
• A disruption in the balance of healthy bacteria, for example after taking antibiotics
• A warm, moist environment (like a nappy area or tight clothing) that encourages yeast to grow
• High blood sugar levels, which feed yeast in people with diabetes

Risk factors

• Taking antibiotics or steroid inhalers
• Poor oral hygiene or ill-fitting dentures
• Smoking
• Being a baby or older adult
• A weakened immune system (e.g., from HIV, chemotherapy, or certain medicines)
• Hormonal changes such as pregnancy or menopause
• Wearing tight, non-breathable clothing or not drying skin folds properly

When to see a doctor

See a doctor urgently if:

• You have trouble swallowing or breathing
• You have a high fever and feel very unwell
• Symptoms are getting worse quickly despite using over-the-counter treatments

Book a routine appointment if:

• You have symptoms of thrush for the first time and want to confirm what it is
• Symptoms do not improve after a week of self-care or pharmacy treatment
• You get thrush frequently (more than 4 times a year)
• You have a long-term condition like diabetes or a weakened immune system

Diagnosis

Thrush is usually diagnosed by a doctor or nurse looking at the affected area and asking about your symptoms. This is often enough to confirm the diagnosis.

Tests that may be done

• A swab of the area (a cotton bud gently rubbed on the affected skin or mouth) to send to a lab for testing, if the diagnosis is not clear or treatment isn't working
• A blood test to check for underlying conditions such as diabetes or immune problems, especially if thrush keeps coming back

What to expect at your appointment

Your doctor may examine the affected area, sometimes using a light. You may be asked about recent medicines, illnesses, and your general health. The appointment usually takes about 10–15 minutes.

Treatment

Treatment for thrush is usually simple and effective. It depends on where the thrush is and how severe it is. Antifungal medicines come as creams, pessaries, tablets, lozenges, or mouthwashes. Some are available without a prescription; others need a prescription from your doctor.

Self-care at home

• Keep the affected area clean and dry, and change into clean, dry underwear daily
• Wear loose-fitting, breathable cotton clothing
• Clean your dentures properly and keep them out overnight
• Avoid sugary foods and drinks while you have thrush
• Use plain, unscented soap and avoid vaginal douching or harsh hygiene products

Medical treatments

Antifungal products are the main treatment for thrush. They may be applied directly to the area as a cream, inserted into the vagina as a pessary, sucked as a lozenge, or taken as a tablet. Your doctor or pharmacist will recommend an appropriate product and course length based on your situation. It is important to finish the full course, even if symptoms improve. Always follow the advice of your healthcare provider or pharmacist about how to take or apply the treatment.

Living with this condition

In most cases, thrush clears up within a couple of weeks with treatment. Keeping the affected area clean and dry, following the treatment plan, and avoiding known triggers can help you feel more comfortable while it heals.

Lifestyle tips

• Adopt good oral hygiene: brush twice a day and floss daily
• If you have diabetes, keep your blood sugar under control
• Stop smoking or get support to quit
• Avoid using antibiotics unless necessary
• Manage stress and get enough sleep to support your immune system

Diet and exercise

A balanced diet with limited refined sugar can help prevent thrush, since sugar feeds yeast. Eating unsweetened yoghurt with live cultures may support healthy bacteria, but this is not a substitute for treatment. Regular exercise helps keep your immune system strong.

Mental health and emotional wellbeing

Thrush can be uncomfortable and embarrassing, especially if it keeps coming back. It is normal to feel frustrated or self-conscious. These feelings are valid, and speaking to a doctor or a trusted friend can help. The condition is not a sign of poor hygiene and is very treatable.

Prevention

Thrush can often be prevented with some simple habits. Keeping the mouth and body clean and dry, eating a balanced diet low in extra sugar, avoiding unnecessary antibiotics, and wearing loose, breathable clothing can all reduce your risk.

Complications

If left untreated

• Persistent or recurrent thrush, which can be painful and interfere with eating, swallowing, or daily activities
• Spreading to the esophagus (food pipe), causing pain and difficulty swallowing
• In rare cases, invasive candidiasis, where the yeast enters the bloodstream and affects internal organs (usually only in severely ill patients)

Long-term outlook

With the right treatment, thrush usually clears up within a couple of weeks. It is not a serious condition for most people, and even when it comes back, there are effective ways to manage it. If you have a weakened immune system or frequent episodes, working with your healthcare team will help you keep it under control. You do not need to worry — help is available, and the outlook is very good.

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