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Vaginal thrush

Vaginal thrush, also known as vaginal yeast infection, is an inflammation caused by a type of yeast called Candida albicans. Vaginal thrush is very common and about three in four women will have at least one episode of thrush at some point during their life.

About vaginal thrush 

Candida albicans can live harmlessly on skin and mucous membranes in or around the vagina. It's usually kept at safe levels by your immune system and other healthy vaginal bacteria. However, a change in the vaginal environment can allow the yeast to grow more than usual, causing thrush (also known as vaginal candidiasis).

Vaginal thrush can keep coming back. Having thrush symptoms more than four times in a year is known as recurrent infection.

Symptoms of vaginal thrush 

You may not have any symptoms, so you may not realise you have vaginal thrush. However, possible symptoms can include:

  • itching, which is often worse at night
  • soreness and irritation
  • thick and white vaginal discharge
  • pain during sex or while passing urine.

You may also have some inflammation of the vulva, including:

  • redness
  • cracked skin
  • swelling.

It's important that you see your GP if you have any of these symptoms.

Complications of vaginal thrush 

Persistent thrush infection may be difficult to control and requires repeat treatments. Recurrent infections can cause discomfort and affect your sex life. You may feel down or anxious because of this.

Causes of vaginal thrush 

Vaginal thrush is caused by an increase in the amount of Candida albicans in the vagina. There are several things which make vaginal thrush more likely, including:

  • taking antibiotics
  • pregnancy
  • diabetes
  • a weakened immune system
  • taking the contraceptive pill
  • wearing tight-fitting clothes, such as jeans or synthetic underwear.

There’s little or no evidence to suggest that using tampons or sanitary towels can cause vaginal thrush. However, a soiled tampon or sanitary towel can provide an ideal environment for bacteria to grow, so it's important that you change them frequently.

Thrush is not thought of as a sexually transmitted infection because you can get it without having sex. However, because men can also carry Candida albicans, sexual partners of people who are carrying the yeast or who have thrush can sometimes develop symptoms as well.

Diagnosis of vaginal thrush 

Your GP will ask about your symptoms and may also ask you about your medical history and whether you’ve had thrush in the past. Your GP will usually diagnose thrush from your symptoms.

If any treatment that your doctor advises doesn't work, your symptoms are considered severe or if thrush keeps coming back, your GP may take a swab from your vagina to confirm the diagnosis. This isn't usually painful, although it may feel a little uncomfortable. The sample is sent to a laboratory for testing.

Treatment of vaginal thrush 


Most thrush infections respond to antifungal treatments such as oral tablets, creams or pessaries. A pessary is a small tablet that’s inserted into the vagina. Examples include clotrimazole and imidazole cream or pessary, and a one-off fluconazole tablet. These are available from your pharmacist without prescription.

Certain treatments for vaginal thrush may damage condoms and diaphragms. There are also reports that some antifungal treatments can stop oral contraceptives working properly. Always get advice from your pharmacist or GP before starting any treatment, and read the accompanying consumer medicine information leaflet. You should complete the full course of treatment even if your symptoms improve.

The infection clears up completely in most women. If your symptoms don't improve in seven to 14 days or the symptoms come back, see your GP, who may prescribe different antifungal medicines.

There isn't any evidence to suggest treating a male partner helps, unless he has a rash or a sore penis.

If you're pregnant, see your GP before using any medicines (including creams and pessaries) to treat thrush.

Prevention of vaginal thrush 

The following tips may help to reduce your risk of vaginal thrush:

  • wear cotton underwear and loose-fitting clothing
  • use unperfumed soap or bath cream
  • don't use products that irritate the vulval area, including antiseptics or disinfectants, as these may disturb the natural protective acidity of the vagina
  • wipe from front to back after going to the toilet
  • if you're prescribed antibiotics and have had vaginal thrush in the past, ask if you need vaginal thrush treatment as well.

Further information 

healthdirect: Thrush

Sexual Health and Family Planning Australia


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Clinical Knowledge Summaries. Candida – female genital. [online] London: National Institutes for Health and Clinical Excellence. 2007 [last updated May 2010, accessed 22 Jun 2011] Available from:

Family Planning NSW. The Vagina - Common Vaginal Conditions. [online] Ashfield, NSW: Family Planning NSW. Jul 2008 [Accessed 18 Jul 2011].

Fischer G. Treatment of vaginitis and vulvitis. Australian Prescriber. 2001; 24: 59-61.

Pirotta MV Garland SM. Genital Candida Species Detected in Samples from Women in Melbourne, Australia, before and after Treatment with Antibiotics. Journal of Clinical Microbiology. 2006; 44(9): 3213-3217.

Qld Health. Thrush (Candidiasis). [online] Brisbane, QLD: The State of Queensland (Queensland Health). Aug 2010 [Accessed 18 Jul 2011] Available from:

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Spence D. Candidiasis (vulvovaginal). [online] London: BMJ Publishing Group. [Last updated Jan 2010, accessed 18 Jul 2011] Available from:

WA Health. Thrush fact sheet. [online] Perth, WA: Public Health Division. Jan 2009 [Accessed 18 Jul 2011] Available from:

Last published: 30 July 2011

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