If you are wondering why do I have abnormal vaginal discharge, the first thing to understand is that vaginal discharge is usually a normal part of a healthy reproductive system. It helps keep the vagina clean and protected, and its amount and consistency can naturally change throughout the menstrual cycle. However, a noticeable change in colour, smell, texture or amount may sometimes indicate an infection, irritation, hormonal change or another gynaecological problem.

Knowing what is normal for you can make it easier to recognise when something has changed. If unusual discharge continues, keeps returning, or occurs with symptoms such as itching, pelvic pain, bleeding or pain when urinating, it is worth speaking with a healthcare professional.

What Is Normal Vaginal Discharge?

Should women have vaginal discharge every day?

Yes. Vaginal discharge is normal for most women and girls.

Healthy discharge can vary considerably. It may sometimes be:

• Clear
• White or milky
• Slightly thick
• Sticky
• Slippery
• More watery at certain times of the month

The amount can also change. Many women notice more discharge around ovulation, during pregnancy, or when using certain forms of contraception.

Normal discharge should not usually have a strong or unpleasant smell.

When Is Vaginal Discharge Considered Abnormal?

How do I know if my discharge is not normal for me?

A change from your usual discharge is more important than one particular colour or texture.

You may want to seek medical advice if your discharge:

• Suddenly becomes much heavier
• Develops a strong or unpleasant smell
• Changes to yellow, green or grey
• Becomes unusually thick or lumpy
• Occurs with itching or soreness
• Is accompanied by pelvic pain
• Causes pain when urinating
• Appears with unexpected vaginal bleeding

These symptoms can occur with several different conditions, so the appearance of discharge alone cannot reliably tell you what is causing it.

Why Do I Have Abnormal Vaginal Discharge?

What can cause unusual vaginal discharge?

There are several possible explanations. Some are common and easily treated, while others require further investigation.

Here are 10 causes women should know about.

1. Bacterial Vaginosis

Can bacterial vaginosis change vaginal discharge?

Yes. Bacterial vaginosis, commonly called BV, occurs when the usual balance of bacteria in the vagina changes.

A woman with BV may notice discharge that is:

• Thin or watery
• White or greyish
• More noticeable than usual
• Associated with a strong fish-like smell

The smell may be particularly noticeable after sex.

BV does not necessarily cause itching or significant soreness, which means some women may not realise they have it.

Is bacterial vaginosis an STI?

No. BV is not classified as an STI, although sexual activity can be associated with its development.

If you notice a new change in discharge or a persistent unpleasant smell, a healthcare professional can help determine whether BV or another condition is responsible.

2. Vaginal Thrush

Can thrush cause thick white discharge?

Yes. Vaginal thrush is caused by an overgrowth of Candida yeast.

Typical symptoms can include:

• Thick white discharge
• Itching
• Irritation
• Soreness around the vulva
• Stinging when urinating
• Discomfort during sex

The discharge associated with thrush often has a cottage-cheese-like appearance and does not usually have a strong smell.

Why does thrush keep coming back?

Thrush can recur in some women. Antibiotic use, pregnancy, hormonal changes, diabetes and some conditions affecting the immune system can increase the likelihood of developing it.

If symptoms repeatedly return or treatment does not work, it is important to have the diagnosis confirmed rather than repeatedly treating yourself.

3. Sexually Transmitted Infections

Can an STI cause unusual vaginal discharge?

Yes. Some sexually transmitted infections can cause changes in vaginal discharge.

An STI may also cause:

• Pain when urinating
• Pelvic pain
• Bleeding between periods
• Bleeding after sex
• Genital irritation
• Sores or blisters

However, an important point is that some STIs produce few or no symptoms. Testing may therefore be necessary if there has been a possible exposure.

Should unusual discharge after a new partner be checked?

Yes. A new or unexplained change in discharge following sexual contact is a good reason to consider a sexual health assessment.

4. Trichomoniasis

Why is my discharge yellow, green or frothy?

Yellow, green or frothy discharge can occur with trichomoniasis, a sexually transmitted infection.

It may also be accompanied by:

• Vaginal irritation
• Discomfort when urinating
• Pain during sex
• An unusual smell

Because different infections can produce similar symptoms, it is better to have the cause confirmed through appropriate testing rather than relying on discharge colour alone.

5. Hormonal Changes

Can hormones affect vaginal discharge?

Yes. Hormonal fluctuations can change both the amount and consistency of vaginal discharge.

You may notice changes during:

• Ovulation
• Before your period
• Pregnancy
• Perimenopause
• Menopause
• Breastfeeding
• Changes in hormonal contraception

For example, discharge can become wetter and more noticeable around ovulation. Pregnancy can also naturally increase vaginal discharge.

Is more discharge during pregnancy normal?

Often, yes. Increased clear or milky-white discharge without an unpleasant smell can be a normal pregnancy change.

However, discharge that becomes green or yellow, develops an unpleasant smell, or occurs with itching, soreness or pain when urinating should be discussed with a healthcare professional.

6. Vaginitis and Irritation

Can vaginal irritation cause unusual discharge?

Yes. Vaginitis refers to inflammation or irritation affecting the vagina and surrounding tissues.

It can cause:

• A change in discharge
• Itching
• Soreness
• Dryness
• Burning
• Pain when urinating
• Pain during sex
• Redness or swelling

Vaginitis can have different causes, including infections, hormonal changes, skin conditions, irritation and foreign objects.

Can scented products cause abnormal discharge?

They can irritate the delicate skin around the vagina and may contribute to discomfort.

Perfumed soaps, vaginal deodorants, scented wipes and vaginal douching are best avoided. Gentle washing of the external area is generally sufficient.

7. Pelvic Inflammatory Disease

Can pelvic inflammatory disease cause vaginal discharge?

Yes. Pelvic inflammatory disease, or PID, affects the female reproductive organs and can cause abnormal discharge alongside pelvic symptoms.

Possible symptoms include:

• Lower abdominal pain
• Pain during sex
• Unusual discharge
• Bleeding between periods
• Bleeding after sex
• Pain when urinating
• Fever or feeling unwell

Abnormal discharge combined with pelvic pain should not be ignored because an infection may require treatment.

Is pelvic pain with abnormal discharge serious?

It can sometimes indicate an infection that needs prompt assessment. If the symptoms are severe or you feel significantly unwell, seek medical advice promptly.

8. Changes Around the Cervix

Can cervical problems cause unusual discharge?

Some changes involving the cervix can contribute to increased discharge or unexpected bleeding.

For example, cervical ectropion can cause increased mucus production and may sometimes result in bleeding after sex.

Cervical polyps can also cause unusual bleeding or discharge.

Persistent changes should be assessed rather than assumed to be a simple vaginal infection.

9. Something Retained Inside the Vagina

Can a forgotten tampon cause abnormal discharge?

Yes. A tampon or another object that has remained inside the vagina can sometimes cause a strong unpleasant smell and unusual discharge.

If you think a tampon may have been forgotten and you cannot remove it, seek medical advice.

Do not try to cover the smell with vaginal deodorants or attempt to clean inside the vagina with a douche.

10. Other Gynaecological Conditions

Can abnormal discharge have another cause?

Yes. Not every change in discharge is caused by BV, thrush or an STI.

Other possibilities can include non-infectious vaginal conditions, cervical conditions and, much less commonly, certain cancers.

This does not mean that unusual discharge usually indicates cancer. Most causes are considerably less serious.

However, persistent unexplained discharge, particularly when accompanied by abnormal bleeding, pelvic pain or other new symptoms, should be assessed by a healthcare professional.

What Does the Colour of Vaginal Discharge Mean?

Is white discharge normal?

White discharge can be completely normal, particularly when there is no strong smell, itching or soreness.

If it becomes thick and lumpy and is accompanied by intense itching or irritation, thrush is one possible explanation.

What does grey discharge mean?

Thin greyish or white discharge with a strong fishy smell is commonly associated with bacterial vaginosis.

What does yellow or green discharge mean?

Yellow or green discharge can occur with some vaginal infections and sexually transmitted infections.

It is important not to assume the exact cause from colour alone.

Is watery discharge normal?

It can be. Discharge can become thinner and wetter around ovulation and may increase during pregnancy.

A sudden change accompanied by smell, irritation, pain or bleeding should be checked.

Why Do I Have More Vaginal Discharge Than Usual?

Can an increase in discharge be normal?

Sometimes. The amount of discharge naturally changes throughout the menstrual cycle.

You may notice more discharge:

• Around ovulation
• During pregnancy
• When sexually aroused
• With some contraceptive methods

However, if the increase is sudden and comes with a new smell, colour change, itching, pain or bleeding, it is worth seeking medical advice.

When Should I See a GP About Vaginal Discharge?

What symptoms should I not ignore?

Arrange a medical assessment if your discharge is unusual for you and:

• Has developed a strong or unpleasant smell
• Has changed colour
• Has become significantly heavier
• Is associated with itching
• Causes soreness or irritation
• Occurs with pelvic pain
• Causes pain when you urinate
• Is accompanied by bleeding between periods
• Happens after sex and is unusual for you

These symptoms can have several causes and may need testing to identify the correct treatment.

Should I See a Gynaecologist for Abnormal Discharge?

Can a gynaecologist diagnose the cause?

Yes. A gynaecologist can assess persistent or recurrent vaginal symptoms, particularly when discharge occurs alongside menstrual problems, pelvic pain, abnormal bleeding, hormonal changes or other gynaecological symptoms.

Depending on the situation, a GP or sexual health clinic may also be an appropriate first point of contact in the UK.

Specialist assessment may be particularly useful when:

• Symptoms repeatedly return
• Initial treatment has not helped
• The cause remains unclear
• Discharge occurs with pelvic pain
• There is unexplained bleeding
• Symptoms are associated with menopause
• Several gynaecological symptoms occur together

How Is Abnormal Vaginal Discharge Diagnosed?

What happens during an appointment?

Your healthcare professional may ask questions about:

• When the discharge started
• How it has changed
• Its colour and consistency
• Whether it has a smell
• Whether you have itching or soreness
• Any pelvic pain
• Pain when urinating
• Any unexpected bleeding
• Your menstrual cycle
• Recent sexual-health concerns
• Pregnancy or recent childbirth
• Medicines and contraception

Depending on your symptoms, you may need an examination, vaginal swab, urine test or STI testing.

The aim is to identify the actual cause rather than treating every unusual discharge as thrush or another common infection. Clinical assessment considers both infectious and non-infectious causes.

How Can I Keep My Vaginal Area Healthy?

What can I do to reduce irritation?

You do not need to eliminate normal vaginal discharge. It is part of the body’s natural protective system.

Simple measures include:

• Wash the external genital area gently
• Use warm water and mild, non-perfumed products
• Avoid vaginal douching
• Avoid perfumed vaginal deodorants
• Avoid scented wipes
• Change out of damp clothing when practical
• Seek advice when your normal discharge changes significantly

Avoid washing inside the vagina. The vagina has its own natural cleaning process, and excessive washing can cause irritation.

Frequently Asked Questions

Why do I have abnormal vaginal discharge?

Abnormal discharge can be caused by bacterial vaginosis, thrush, sexually transmitted infections, hormonal changes, irritation, vaginitis and several other gynaecological conditions. A change in discharge alone cannot confirm the cause.

Why does my vaginal discharge smell fishy?

A strong fishy smell, particularly when the discharge is thin and greyish-white, can be associated with bacterial vaginosis.

Why is my vaginal discharge thick and white?

Thick white discharge with itching, soreness or irritation can be associated with vaginal thrush. Thrush discharge does not usually have a strong smell.

Is yellow vaginal discharge normal?

Yellow discharge can have different explanations. Yellow or green discharge, particularly when accompanied by irritation, pain or an unpleasant smell, should be assessed rather than self-diagnosed.

Can hormones cause abnormal vaginal discharge?

Hormonal changes can alter the amount and consistency of discharge. More discharge can occur around ovulation and during pregnancy, for example.

Can abnormal discharge be an STI?

Yes. Some STIs can cause unusual discharge, although many STIs produce no noticeable symptoms. Testing is the only reliable way to establish whether an STI is present.

Can a UTI cause vaginal discharge?

A UTI primarily affects the urinary system and usually causes urinary symptoms rather than vaginal discharge. If you have both urinary symptoms and unusual discharge, another vaginal, cervical or sexually transmitted infection may also need to be considered.

When should I worry about vaginal discharge?

You should seek medical advice if discharge changes significantly or occurs with pelvic pain, itching, soreness, pain when urinating, abnormal bleeding or a strong unpleasant smell.

Should I see a gynaecologist for abnormal discharge?

A GP or sexual health clinic can often be an appropriate first step in the UK. A gynaecologist may be involved when symptoms are persistent, recurrent, unexplained or associated with other gynaecological problems.

Final Thoughts

If you have been asking “why do I have abnormal vaginal discharge?”, remember that vaginal discharge itself is not usually a sign that something is wrong.

The important question is whether the discharge has changed from what is normal for you.

A new smell, unusual colour, significant increase in volume, change in consistency, itching, soreness, pelvic pain or unexpected bleeding can indicate that something needs to be checked.

Common causes include bacterial vaginosis, thrush, infections, hormonal changes and vaginal irritation. Other gynaecological conditions can also produce similar symptoms.

Rather than trying to diagnose the cause from the appearance of your discharge, speak with a GP, sexual health professional or gynaecologist if the change persists or is accompanied by other symptoms.

Getting the correct diagnosis is the best way to make sure you receive the right treatment.

Medical Disclaimer

This article is intended for general educational purposes and does not replace an individual medical consultation, diagnosis or treatment. Vaginal discharge can have many causes and similar symptoms can occur with different conditions. If you have persistent or unusual discharge, pelvic pain, abnormal bleeding, severe symptoms or concerns about an STI, seek advice from a qualified healthcare professional.