Yeast Infection: Causes, Types & Effects

What is a Yeast Infection?

A yeast infection is caused by an overgrowth of Candida, a fungus naturally present in the body. Candida albicans, a yeast, causes an infection when it grows out of control within the body. Candida is part of the body's flora and is harmless as long as it stays on the skin, in the mouth, in the gut, and in the vagina, in the required amounts. When the balance between bacteria and yeast is disrupted, the fungus multiplies quickly, which can lead to different health issues.

Yeast infection is graded as:

Acute Candidiasis: An isolated, brief presentation that clears up after treatment.
Recurrent: Four or more occurrences in a year, treatment required for more than a year
Invasive Candidiasis: A serious blood infection, usually occurring in hospitalised or immunocompromised patients.

Types of Yeast Infection

Yeast infection is a general term and can refer to several conditions, as Candida can cause infection in several parts of the body. It is important to recognise the various types of Candida to make an accurate diagnosis and receive appropriate treatment.

Types of yeast infection include:

Vaginal Yeast Infection (Vulvovaginal Candidiasis) This is the most common type, which is an overgrowth of Candida in the vagina. It causes extreme itching, burning, redness and a white, non-fragrant discharge. It is not a sexually transmitted infection, although sexual activity can sometimes trigger it.
Oral Yeast Infection (Oral Thrush) This condition impacts the oral cavity and throat. It shows up as white, creamy patches on the tongue, inside the cheeks or gums. Oral thrush is most frequently observed in newborns, the elderly, individuals who use steroid inhalers, and individuals with compromised immune systems.
Cutaneous Candidiasis (Skin Yeast Infection) This type develops in warm, moist skin folds, such as the groin, underarms, under the breasts, or between fingers. It creates red, irritated and sometimes raw patches of skin with a scaly edge. Cutaneous candidiasis is common in India, especially when the weather is humid.
Invasive Candidiasis Invasive candidiasis is the most severe case of yeast infection. The fungus infiltrates the blood and may be carried throughout the body, including to the kidneys, heart and brain. It typically occurs in patients who are in intensive care units (ICUs), taking long-term antibiotics, or have other medical conditions like HIV or poorly controlled diabetes.
Male Genital Yeast Infection Although less frequent, men can get yeast infections at the tip of the penis, which are characterised by redness, itching, and discharge. It appears to occur more frequently in uncircumcised men and among diabetic patients.

Stages of Yeast Infection

Yeast infections do not have fixed numbered stages. Vaginal yeast infections are generally classified according to symptom severity, recurrence, the type of Candida involved and the patient’s overall health. These are indicated in brief in the table below:

Stage or Severity Level	Features
Mild-to-Moderate Infection	Mild or moderate itching, burning, soreness, redness and thick vaginal discharge may occur.
Severe Infection	Intense itching, extensive redness, swelling, pain or cracks in the vulval skin may develop.
Recurrent Infection	Symptomatic yeast infection occurs three or more times within one year.
Complicated Infection	The infection is severe, caused by a non-albicans Candida species or occurs with uncontrolled diabetes or weakened immunity.

How Common is Yeast Infection in India?

Yeast infections are among the most common fungal conditions affecting people across India, but they often go undiagnosed or unreported. Many women use over-the-counter (OTC) creams to treat it without seeking medical attention.

According to clinical studies, the incidence of vaginal yeast infections among Indian women is 10%-35%, with Candida albicans accounting for 80-85% of these infections, a higher figure than in most global studies.

The burden is higher in India due to its tropical climate, high prevalence of uncontrolled diabetes, increasing use of antibiotics, and lack of awareness about the importance of vaginal hygiene.

What are the Symptoms of a Yeast Infection?

Yeast infection symptoms can range from mild irritation to severe inflammation. Persistent, recurrent or severe symptoms require medical assessment. Some of the early warning signs and severe stage symptoms of yeast infection are listed in the table below:

Early Warning Signs	Severe-Stage Symptoms
Mild itching or irritation around the vagina and vulva Burning or discomfort, especially while urinating Thick, white vaginal discharge without a strong smell Mild pain or discomfort during sexual intercourse	Intense or persistent itching and soreness Marked redness and swelling of the vulva Cracks, cuts or raw areas on the affected skin Significant pain that interferes with routine activities

Diseases Similar to Yeast Infection

A vaginal yeast infection may resemble other vaginal conditions because they can cause itching, irritation, burning and unusual discharge. Bacterial vaginosis and trichomoniasis are two conditions that may need to be distinguished from a yeast infection.

The following comparison highlights the major differences between these conditions:

Yeast Infection Vs. Bacterial Vaginosis Vs. Trichomoniasis

Feature	Yeast Infection	Bacterial Vaginosis	Trichomoniasis
How It Happens	An overgrowth of Candida yeast causes inflammation in the vagina and vulva.	An imbalance between beneficial and harmful vaginal bacteria causes the condition.	Infection with the parasite Trichomonas vaginalis causes this sexually transmitted infection.
Location	Mainly affects the vagina and vulva.	Mainly affects the vagina.	Commonly affects the vagina, vulva and urethra.
Associated Symptoms	Itching, soreness, burning during urination and thick white discharge without a strong smell.	Thin white or grey discharge, a fish-like smell, itching and burning during urination.	Irritation, burning during urination and thin vaginal discharge that may have an unusual smell.
Severity	Usually mild but may cause severe redness, swelling or cracks in the affected skin.	Often mild or symptomless but may increase the risk of pregnancy complications and other infections.	Symptoms may range from mild irritation to severe inflammation, although many people have no symptoms.
Can It Be Reversed?	Symptoms can usually be treated with appropriate antifungal medicines, although infections may recur.	Bacterial vaginosis can usually be treated with antibiotics but may return after treatment.	Trichomoniasis can usually be cured with prescribed antimicrobial treatment, but sexual partners may also require treatment.

What Causes a Yeast Infection?

Candida overgrowth occurs when conditions in the body enable the yeast to grow beyond its normal levels.

Causes
- Antibiotic Use: Eliminates beneficial bacteria, which would otherwise prevent the growth of yeast.
- Vaginal pH Changes: Vaginal pH changes are caused by hormonal changes during pregnancy, menstruation or oral contraceptives.
- High Blood Sugar: When diabetes is not controlled, high sugar levels feed the yeast, causing these infections to recur.
- Immunosuppression: This condition occurs when fungal control is weakened due to conditions such as HIV/AIDS, chemotherapy or prolonged use of steroids.
- Clothing & Hygiene: Tight and non-breathable clothes will retain moisture, and scented hygiene products will eliminate natural flora.
Risk Factors:
- Pregnancy: Pregnant women are susceptible to yeast infection due to hormonal changes.
- Obesity: Excess skin folds enable ideal moist environments.
- Medical Intervention: Long hospitalisation (IV lines or catheters) and use of a steroid inhaler raise the risk.
- Other Conditions: Metabolic syndrome, hypothyroidism and anaemia may also compromise immune defences.

What are the Complications of Yeast Infection?

Some of the complications associated with yeast infection are:

Intense itching and scratching can lead to the opening of tiny pores or cracks on the skin, which may lead to secondary bacterial diseases like cellulitis.
Untreated cracks and fissures can be painful and lead to genital damage and tissue scarring.
Recurring yeast infections can cause vulvovaginal candidiasis when infection happens four or more times in a year.
Yeast infections can also cause severe discomfort during pregnancy. Newborns become susceptible to oral thrush during delivery.

When Should I See a Healthcare Provider?

While some symptoms may respond to OTC remedies in mild infections, other signs and symptoms require professional medical evaluation. Visiting a doctor will help ensure a correct diagnosis, rule out other issues, and help prevent the infection from worsening into a more serious or recurrent issue.

Contact your doctor if:

This is your first yeast infection, and you are unsure of the diagnosis.
Symptoms are severe, for example, if there is significant redness, swelling or cracking of the skin.
No improvement in symptoms after 3 days of OTC antifungal treatment.
In a year, you get four or more yeast infections.
You are pregnant and suspect you have a vaginal yeast infection.
You are also a person with diabetes, HIV, or are taking immunosuppressing drugs.
You have a fever, chills, or do not feel well, plus regional symptoms.
Men who are treated with anti-VEGF drugs also experience symptoms.

How is a Yeast Infection Diagnosed?

The diagnosis of Candida is made by a doctor based on a combination of patient history, physical examination and laboratory testing, which helps rule out other ailments like bacterial vaginosis.

The following are some of the commonly used diagnostic techniques in India for determining yeast infections:

Medical History and Physical Examination The doctor will ask about the symptoms, any use of antibiotics recently, any underlying health issues, and sexual activity. A pelvic exam is done to check for redness, discharge, and swelling.
Vaginal pH Testing A swab test measures the acidity level inside the vagina. Normal vaginal pH is less than 4.5. Yeast infections tend to have a normal pH, as opposed to bacterial vaginosis, a different kind of vaginal infection that results from bacterial imbalance, which is more acidic.
Wet Mount Microscopy A microscope is used to examine a swab from the vagina for any budding yeast cells. This is an easy-to-perform and widely available test in India.
Fungal Culture For recurrent or fail-to-respond cases, a culture test is performed on the vaginal swab sample to determine which specific Candida species is present and to see what type of antifungal drugs will be effective.

Diagnostic Reference Table

Test	What It Detects	When Used
Physical Examination	Redness, discharge, swelling	First visit
Vaginal pH	Identifies yeast vs bacterial infection	Routine cases
Wet Mount Microscopy	Structures and cells of yeast.	Most cases
Fungal Culture	Identifies species, drug sensitivity	Cases that recur or fail to respond to treatment. Repeat or unremitting cases.

How is a Yeast Infection Treated or Managed?

Treatment for candidiasis is usually simple, but it depends on the severity and frequency of the infection. The basic strategies are:

Lifestyle Management
- Diet: Avoid refined sugar and processed carbs, which promote yeast growth. Curd, a probiotic-rich food, can be part of the daily Indian diet and help restore a balance in the bacteria.
- Clothing: Use loose and breathable cotton underwear. Try to avoid tight synthetic fabrics, particularly when they are wet.
- Hygiene: Maintain a clean and dry genital area. Do not use scented soaps, perfumes or vaginal douches.
- Blood Sugar Control: Diabetic patients should keep their blood sugar levels under control, as elevated blood sugar is a big factor in causing the recurrence of infection.
- Probiotic Use: Lactobacillus probiotics can restore the natural vaginal flora, especially after antibiotics.
Medical Management
- Topical Antifungal Creams and Pessaries: Used directly on the skin or inserted into the vagina for 3-7 days.
- Oral Antifungal Tablets: Oral antifungal tablets are usually prescribed to treat vaginal yeast infections and may require a longer course of treatment lasting 6 months for recurrent infections.
- Long-Term Suppressive Therapy: If a woman has had four or more bouts a year, antifungal treatment is recommended weekly for 6 months to prevent further outbreaks.
- Intravenous Antifungals: These are only used for hospitalised patients with invasive or bloodstream candidiasis.

Note: Do not take drugs without a diagnosis. With the overuse of anti-fungals without a proper diagnosis, there is a risk of developing drug resistance.

Common Medicines Used to Treat a Yeast Infection

The choice of medicine depends on the location of the yeast infection, its severity, recurrence and the patient's overall health. Commonly used medicines to treat a yeast infection may include:

Clotrimazole: Available as topical creams and vaginal preparations, clotrimazole is commonly used for uncomplicated vaginal and skin yeast infections.
Miconazole: Miconazole is available in topical and vaginal forms and helps treat itching, burning and irritation caused by vaginal or skin candidiasis.
Fluconazole: This oral antifungal medicine may be prescribed for vaginal, oral, esophageal or systemic candidiasis, depending on the type and severity of infection.
Nystatin: Nystatin is commonly used for oral thrush and skin candidiasis and may also be considered for selected vaginal infections.
Caspofungin, Micafungin and Anidulafungin: These intravenous medicines are commonly used in hospitals for candidemia and other forms of invasive candidiasis.
Amphotericin B: Amphotericin B may be used for severe or life-threatening invasive candidiasis when it is considered appropriate for the patient.

Note: Intravenous medicines for invasive candidiasis must be administered under specialist supervision in a hospital. Amphotericin B requires close monitoring because it may affect kidney function and electrolyte levels.

How Can I Prevent a Yeast Infection?

These simple steps can help you prevent yeast infections:

Use Breathable Cotton Underwear: Underwear made of synthetic materials will keep moisture and heat trapped, promoting yeast growth.
Change Out of Wet Clothing: Clothes like swimwear or clothes that are sweaty after a gym session should not be worn for a long time.
Stay Away from Scented Intimate Products: Scented soaps, sprays and douches should be avoided, as they interfere with the natural environment of the vagina.
Use Antibiotics Only When Prescribed: Unnecessary antibiotic use kills off beneficial bacteria, which is a top trigger in India.
Take Control of Blood Sugar: If you have diabetes or are pre-diabetic, keep your glucose in check with diet, exercise and medication.
Eat Probiotics: Including probiotics or curd in your diet can help to maintain a good flora and fauna balance.
Keep the Skin Folds Under Control: Cutaneous candidiasis is less likely to occur if the skin folds are free from excess fat.
Change Sanitary Products Regularly: During periods, changing sanitary products often diminishes heat and moisture that can lead to yeast build-up.

What is the Prognosis of a Yeast infection?

The prognosis of a yeast infection is generally good, especially for uncomplicated vaginal, oral or skin candidiasis. Most vaginal yeast infections improve with appropriate antifungal treatment, with symptom relief and negative cultures seen in most of the patients who complete therapy.

Recurrent, severe or non-albicans Candida infections may be harder to treat and can require longer-term medical management. Invasive candidiasis is a serious hospital-acquired infection, and the outcome depends on early diagnosis, the organs affected and the patient’s overall health.

Yeast Infection Treatment Cost in India

The cost of yeast infection treatment depends on the type of infection, diagnostic tests, prescribed medicines and whether hospitalisation is required. Mild infections are generally treated on an outpatient basis, whereas invasive candidiasis requires prolonged hospital care.

An overview of yeast infection treatment costs is given below:

Treatment	Estimated Cost Range (₹)
General physician consultation	₹300 - ₹1200
Gynaecologist or dermatologist consultation	₹500 - ₹2,000
Vaginal pH test or wet mount microscopy	₹300 - ₹800
Fungal culture	₹800 - ₹2,500
Oral antifungal medicines	₹150 - ₹1,000
Topical antifungal creams or vaginal pessaries	₹150 - ₹800
Hospitalisation for invasive candidiasis	₹50,000 - ₹3,00,000+

Note: The yeast infection treatment costs mentioned above are estimates and may change depending on the hospital, city, doctor’s expertise, investigations, and individual medical requirements.

Does Health Insurance Cover Yeast Infection in India?

Yes. Most health insurance plans cover the treatment for a yeast infection if the infection is severe and requires hospitalisation, such as invasive candidiasis (thrush) treated with IV antifungals. They usually cover accommodation fees, medication, medical tests and doctor charges. However, outpatient tests, doctor consultations and medicines can be covered only with an OPD cover.

Moreover, an initial waiting period of 30 days may apply before a claim can be raised. Make sure to read your policy's inclusions and exclusions carefully to know what your insurer will pay for, as the terms and conditions may vary depending on the plan.

How Much Health Insurance Coverage is Needed for a Yeast Infection?

The treatment cost of a yeast infection on an outpatient basis ranges from ₹500 to ₹5,000, which includes doctor consultation fees, over-the-counter antifungal creams and a short course of oral antifungal tablets. If the infections recur and the treatment plan is more extensive or requires specialist follow-up, the annual cost would range from ₹5,000 to ₹15,000, depending on the city and facility. In case of hospitalisation, expenses can be in lakhs, especially if the patient has diabetes, is immunocompromised, or has frequent infections.

Hence, a medical coverage of at least ₹5 to 10 lakh is recommended to cover a prolonged hospital stay for invasive fungal infections in a private hospital in India. The severity and duration of the infection determine the hospital expenses.

Frequently Asked Questions (FAQs)

Q1. What is the main cause of a yeast infection?

Ans. Yeast infections often occur due to overgrowth of the fungus Candida Albicans that naturally live within the body. Hormone fluctuations during pregnancy or menstruation can also alter the natural balance, increasing the risk of yeast infections.
Q2. What are the first signs of a yeast infection?

Ans. The first symptoms of a yeast infection are usually severe itching and a burning sensation in the vagina, which is sometimes accompanied by a thick, white discharge. There may also be a mild, red swelling around the vulva that may be visible in the early stages. The initial symptoms of oral thrush are typically white patches in the mouth or on the tongue.
Q3. How is a yeast infection different from a bacterial infection?

Ans. Yeast infection is triggered by a fungus (Candida), and an imbalance of bacteria triggers bacterial vaginosis. A thick, white, odourless discharge is common with yeast infection, and a thin, grey, fishy discharge is also typical with bacterial vaginosis. The vaginal pH remains normal during a yeast infection and higher than 4.5 during a bacterial infection.
Q4. Can men get yeast infections?

Ans. Yes, men can get yeast infections, but it is not as likely. It is typically characterised as redness, itching, and whitening of the head of the penis and discharge. The infection is more common in men who are not circumcised, have diabetes, or have had unprotected sex with someone who has a yeast infection.
Q5. Is a yeast infection sexually transmitted?

Ans. No, a yeast infection is not a sexually transmitted infection. Candida is naturally present in the body. But sometimes sexual activity may cause symptoms or make someone temporarily susceptible to becoming infected.
Q6. Can diabetes cause recurrent yeast infections?

Ans. Yes. Sugar levels in the vaginal fluids of diabetic patients are high and promote the growth of Candida if the diabetes is not controlled. Better glycaemic control, diet, medication and lifestyle changes are critical to stopping the cycle of recurrent infections.
Q7. What should I eat or avoid if I have a yeast infection?

Ans. Decreasing the intake of refined sugar, white rice, sweet drinks, and processed foods is advisable, as these foods can enable the growth of the yeast and cause an infection. Fresh curd, buttermilk, green vegetables, and probiotic foods are great for the growth of beneficial bacteria and improve gut flora.
Q8. Are yeast infections common during pregnancy?

Ans. Yes, vaginal yeast infections are very common during pregnancy. The hormonal shift affects the vaginal environment, causing a change in pH and bacteria, increasing a woman’s vulnerability.
Q9. Can children get yeast infections?

Ans. Yes. Oral thrush is more prevalent in babies and newborns, and can be passed on at birth and/or from mother to child during breastfeeding. Children's yeast infections must always be evaluated and treated by a physician.
Q10. How long does a yeast infection take to heal?

Ans. A mild yeast infection typically responds to antifungal treatment within 3 - 7 days. If the infection is more severe or recurrent, it may require treatment for weeks or a prolonged "suppressive" treatment lasting up to 6 months. If symptoms do not improve within 3 days of OTC treatment, a physician should be consulted to rule out resistant strains or misdiagnosis.
Q11. Can I treat a yeast infection at home without a doctor?

Ans. It depends on whether it is a confirmed yeast infection or not. For those with a previous yeast infection and the same symptoms, over-the-counter antifungal creams or suppositories can be used. Self-treatment is not recommended in case of a first-time yeast infection, pregnancy, or recurrent infection.
Q12. What complications can arise from untreated yeast infections?

Ans. Leaving yeast infections untreated can cause chronic recurrence, skin damage from the constant itching and complications during pregnancy. If not treated, in immunocompromised patients, an infection can spread into the bloodstream and reach vital organs, which is a more serious form of infection known as invasive candidiasis.
Q13. Are elderly people at higher risk for yeast infections?

Ans. Yes. Older adults are at greater risk of getting yeast infections due to immune system compromise from ageing, diabetes, chronic diseases, and frequent antibiotic use. Shared environments and the use of catheters or other medical devices increase the risk to residents in care facilities.
Q14. Does health insurance cover yeast infection treatment in India?

Ans. Yes, health insurance covers yeast infection treatment. In case of milder infections, outpatient visits and/or pharmacy expenses are covered only if your plan has an OPD benefit. Hospitalisation for invasive candidiasis is covered by regular health insurance. Other diagnostic tests that are performed while in the hospital are also usually included. You must check your policy to know the exact scope of coverage and applicable waiting periods.
Q15. Which diseases are linked to recurring yeast infections?

Ans. Several factors make frequent yeast infections more likely. The list includes diabetes, HIV/AIDS, hypothyroidism, anaemia, obesity, and metabolic syndrome. Other long-term treatments, such as corticosteroid medications or cancer treatment like chemotherapy, can also lower resistance.

References
- https://www.cdc.gov/std/treatment-guidelines/candidiasis.htm
- https://www.cdc.gov/fungal/hcp/clinical-care/index.html
- https://medlineplus.gov/druginfo/meds/a682758.html
- https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=31e74606-bccd-4276-bb20-a1933ce4ca25
- https://pubmed.ncbi.nlm.nih.gov/25510301/