Vaginal Candidiasis (Yeast Infection): Causes and Cures
Women's Health
April 2, 2026
3 min read

Vaginal Candidiasis (Yeast Infection): Causes and Cures

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Ultima Pharmacy Team
Ultima Pharmacy & Walk-in Clinic

Medical Disclaimer: The information provided in this article is for educational purposes only and does not substitute for professional medical advice. Please consult with our pharmacists or a healthcare provider for an accurate diagnosis and treatment plan.

Understanding Vaginal Yeast Infections

Vaginal candidiasis, commonly known as a yeast infection, is a fungal infection that causes intense itching, irritation, and abnormal discharge from the vagina and the vulva (the tissues at the vaginal opening). It is incredibly common, affecting up to 3 out of 4 women at some point in their lifetimes. Many women experience two or more episodes.

A healthy vagina naturally contains a balanced mix of yeast (including Candida albicans) and bacteria (such as Lactobacillus). The bacteria produce acid that keeps the yeast population in check. However, when this delicate balance is disrupted, Candida can overgrow, penetrating the deeper layers of vaginal tissue and causing an inflammatory infection.

Common Causes of Yeast Overgrowth

Several factors can upset the natural vaginal ecosystem, leading to a yeast infection:

  • Antibiotic Use: This is the most common trigger. Broad-spectrum antibiotics taken for a UTI or sinus infection indiscriminately kill the healthy Lactobacillus bacteria in the vagina, allowing yeast to multiply rapidly.
  • Hormonal Changes: Elevated estrogen levels, such as those occurring during pregnancy, right before your period, or from high-dose birth control pills, encourage Candida growth.
  • Uncontrolled Diabetes: Elevated blood sugar levels mean higher sugar concentrations in vaginal secretions, providing a ready food source for yeast.
  • Weakened Immune System: Stress, fatigue, or immunosuppressive conditions make it harder for your body to fight off an overgrowth.
  • Moisture and Warmth: Yeast thrives in warm, damp environments. Wearing wet swimsuits, sweaty workout clothes, or tight synthetic underwear for extended periods can create the perfect breeding ground.

Recognizing the Symptoms

The symptoms of a yeast infection range from mild to severe and typically include:

  • Intense itching, burning, and irritation in the vagina and vulva.
  • A thick, white, odor-free vaginal discharge with a "cottage cheese" consistency.
  • Redness and swelling of the vulva.
  • A burning sensation during urination or during sexual intercourse.

Note: If the discharge is yellow, green, or has a strong, unpleasant ("fishy") odor, it is likely a bacterial infection (like Bacterial Vaginosis) or a sexually transmitted infection (STI), which requires a different type of medical treatment.

Prevention and Hygiene

Simple lifestyle changes can help prevent recurrent yeast infections. Wear breathable cotton underwear and loose-fitting clothing. Change out of wet swimsuits and sweaty gym clothes immediately. Avoid using scented tampons, heavily perfumed bubble baths, and vaginal douches, as these destroy the healthy bacteria needed to prevent yeast overgrowth.

Fast, Discreet Treatment at Ultima Pharmacy

You don't need a doctor's appointment to find relief from the intense itching of a yeast infection. Under Ontario's minor ailment prescribing program, the pharmacists at Ultima Pharmacy can assess your symptoms in our private consultation room. If you have been previously diagnosed with a yeast infection by a physician and recognize the symptoms, or if this is an uncomplicated first-time occurrence, we can prescribe a highly effective treatment.

We can recommend over-the-counter topical antifungal creams (like Canesten) or immediately prescribe a strong oral antifungal pill (such as a single dose of fluconazole) that works systemically to clear the infection from the inside out within 24 to 48 hours. Stop by our North York pharmacy today for fast, private relief.

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