Thrush: Causes and Treatment Options
Thrush is one of the most common reasons women visit a pharmacy, and almost all women will experience it at some point. It is caused by a yeast called candida that lives harmlessly in the body and only causes trouble when it overgrows. Although it is uncomfortable, it is not usually serious and is easily treated. Understanding what triggers the overgrowth is the key to clearing it and keeping it away.
What causes thrush
Candida albicans is naturally present in the vagina, mouth and gut. Problems start when something disrupts the normal balance. Antibiotics are a frequent trigger because they remove the bacteria that keep yeast in check. High blood sugar, pregnancy, hormonal changes, tight synthetic clothing and using perfumed products can also encourage overgrowth. It is not a sexually transmitted infection, although it can occasionally be passed between partners.
The symptoms
- An intense itch or irritation around the vulva and inside the vagina
- White, thick discharge that is often described as like cottage cheese, usually with little or no smell
- Soreness, stinging or discomfort, especially when passing urine or during sex
- Redness, swelling and cracks in the skin around the entrance to the vagina
Symptoms can range from mild to severe. A minority of women have no symptoms at all and only find out when a test is done for another reason.
Treatment options
For most women, thrush is treated at home with products bought from a pharmacy. An antifungal cream soothes the outside, a pessary treats the inside, and an oral capsule treats the whole body from within. The right choice depends on whether you are pregnant or breastfeeding, what you have used before and what suits you, so it is worth asking the pharmacist. If you have never had thrush before, see a GP or nurse to confirm the diagnosis rather than guessing.
| Option | How it is used | Points to note |
|---|---|---|
| Antifungal cream | Applied to the itchy area, often with a pessary | Good for external soreness and relief |
| Pessary | Inserted into the vagina, usually for one night | Effective but can be messy |
| Oral capsule | A single tablet swallowed with water | Not for use in pregnancy |
Self-care while it clears
Wear loose cotton underwear, avoid tight clothing and use plain water rather than perfumed products to wash the area. Pat dry rather than rubbing. Over-the-counter pain relief can help if passing urine stings. Avoid sex until symptoms settle, both for comfort and because treatment can irritate a partner.
When to see a doctor
See a GP if this is your first episode, if you are pregnant, if symptoms return within a few weeks, or if the treatment has not worked after seven days. Recurrent thrush, usually defined as four or more episodes a year, can be a sign that something else is going on, such as high blood sugar or a weakened immune system. A doctor may test a swab and can prescribe a longer course or a different treatment. Always check with a pharmacist or GP before changing how you treat it.
Preventing future episodes
Choosing fragrance-free products, changing out of wet swimwear quickly, keeping blood sugar stable and only using antibiotics when they are actually needed all help. For women who get thrush after every course of antibiotics, a pharmacist can advise on using an antifungal alongside, and probiotics are sometimes suggested, though the evidence is mixed. If you are on hormonal contraception and notice it seems to trigger episodes, mention this at your next review.
Thrush is a nuisance, not a serious illness, and a few straightforward habits can keep it rare. When it does appear, early treatment with the right product will usually clear it within a few days.