Polycystic ovary syndrome (PCOS): symptoms, causes, diagnosis, treatment and how to manage it

Polycystic ovary syndrome (PCOS) is one of the most common hormonal conditions affecting women during their reproductive years. It can influence menstrual cycles, ovulation, skin, hair, weight, fertility and metabolic health. Yet PCOS does not look the same in every woman. Some have irregular periods and acne, some mainly struggle with unwanted facial hair, while others may have very few obvious symptoms.

PCOS affects an estimated 10–13% of reproductive-aged women worldwide, and many people remain undiagnosed. It can begin during adolescence but is often recognised later, particularly when irregular periods or difficulty conceiving leads someone to seek medical advice.

Importantly, having PCOS does not mean that a woman cannot have children, cannot maintain a healthy weight or cannot live a normal life. PCOS is a long-term condition, but its symptoms and associated health risks can be managed with the right combination of lifestyle measures, medical treatment and regular follow-up.

What is PCOS?

PCOS is a hormonal and metabolic condition associated with hormonal imbalance, particularly higher-than-usual androgen activity and problems with ovulation.

The name can be misleading. You do not need to have ovarian cysts to have PCOS. The small structures sometimes seen on an ultrasound are usually follicles containing immature eggs rather than conventional ovarian cysts.

PCOS can affect several aspects of health, including:

• Menstrual cycles and ovulation
• Fertility
• Skin and hair
• Body weight and fat distribution
• Blood sugar and insulin metabolism
• Emotional wellbeing
• Pregnancy health

The exact cause is not fully understood. Genetics, hormonal factors and insulin resistance are thought to contribute. A family history of PCOS or type 2 diabetes can increase the likelihood of developing the condition.

What are PCOS symptoms in females?

PCOS symptoms vary considerably from one woman to another. Some women have several symptoms, while others have only one or two.

Common symptoms include:

• Irregular, infrequent or absent periods
• Difficulty becoming pregnant
• Excess facial or body hair
• Acne or oily skin
• Thinning hair or hair loss from the scalp
• Weight gain or difficulty losing weight
• Darkened skin, particularly around the neck or skin folds
• Skin tags
• Increased abdominal fat
• Mood changes, anxiety or depression in some women

Not every woman with PCOS is overweight, and not everyone with PCOS has visible symptoms.

What are the 5 signs of PCOS?

Five commonly recognised signs are:

1. Irregular or absent periods
2. Excess facial or body hair
3. Acne or oily skin
4. Thinning scalp hair
5. Difficulty conceiving because of irregular ovulation

However, these symptoms can have causes other than PCOS. Having one of them does not automatically mean you have PCOS.

What are the 5 symptoms of PCOS?

Another simple way to remember the common symptoms is:

• Irregular periods
• Excess hair growth
• Acne
• Weight changes or difficulty losing weight
• Fertility problems

Some women may instead experience scalp hair thinning, darkened skin or other metabolic symptoms.

At what age does PCOS start?

PCOS can begin after puberty, and symptoms may become noticeable around the time of the first menstrual periods. However, diagnosing PCOS during adolescence can be more complicated because irregular periods and hormonal changes can be normal during the early years after menstruation begins.

PCOS is often diagnosed in the 20s or 30s, particularly when a woman seeks help for irregular periods or difficulty becoming pregnant.

What is PCOS 1st stage?

There is no medically accepted “stage 1” of PCOS in the way some cancers or other diseases are staged.

PCOS is a varied condition rather than a disease that progresses through fixed stages. A woman may have predominantly menstrual symptoms, androgen-related symptoms such as acne or excess hair, metabolic problems, fertility difficulties, or a combination of these.

The severity of symptoms can also change over time.

What does PCOS do to a girl?

In teenagers, PCOS can affect periods, skin, hair growth, body weight and emotional wellbeing. Irregular periods may be particularly noticeable.

It can also affect confidence and body image, especially when acne, unwanted facial hair or weight changes occur. PCOS is associated with a higher prevalence of anxiety and depression, so emotional wellbeing should be considered part of PCOS care rather than treated as an unrelated issue.

A teenager with possible PCOS should be assessed carefully because normal pubertal changes can sometimes resemble PCOS.

What does a PCOS body look like?

There is no single “PCOS body type.”

A woman with PCOS may be overweight, slim, muscular or somewhere in between. Some women carry more weight around the abdomen, while others have no obvious body-shape changes at all.

PCOS cannot be diagnosed simply by looking at someone’s body.

Can a PCOS girl be slim?

Yes. Absolutely.

PCOS can occur in women who are slim or have a normal body weight. This is sometimes called “lean PCOS,” although it is not a separate type of PCOS.

Being slim does not rule out hormonal or metabolic abnormalities. A woman can have irregular ovulation, androgen-related symptoms or PCOS-related metabolic risk without being overweight.

What is a PCOS belly?

“PCOS belly” is an informal term commonly used to describe increased abdominal fat or bloating that some women with PCOS experience.

PCOS can be associated with increased central adiposity and metabolic problems, but having a larger abdomen does not prove that someone has PCOS. Abdominal size can also be influenced by genetics, diet, activity, age, bloating and many other factors.

Does PCOS increase stomach size?

It can contribute to increased abdominal fat in some women, particularly when weight gain and insulin resistance are present. However, PCOS does not automatically cause an enlarged stomach.

Persistent abdominal swelling or bloating should not simply be attributed to PCOS without considering other possible causes.

How can PCOS affect your life?

PCOS can affect more than periods and fertility.

Some women find that acne, unwanted hair growth or hair loss affects their confidence. Others may struggle with weight management or concerns about fertility. The condition can also increase the risk of metabolic problems such as insulin resistance, type 2 diabetes, high blood pressure and abnormal cholesterol.

PCOS can also affect quality of life and emotional wellbeing. Anxiety, depression, eating disorders and negative body image are more common among women with PCOS.

The good news is that managing these different aspects together can make a substantial difference.

Is PCOS serious?

PCOS is not usually an emergency, but it should not be ignored.

It is a chronic condition associated with increased long-term risks, including:

• Insulin resistance
• Prediabetes and type 2 diabetes
• High blood pressure
• Abnormal cholesterol
• Cardiovascular disease
• Sleep apnea
• Endometrial hyperplasia
• Increased risk of endometrial cancer
• Pregnancy complications such as gestational diabetes and high blood pressure

The absolute risk of some complications remains relatively low, but regular medical follow-up can help identify and manage risk factors early.

How is PCOS diagnosed?

There is no single blood test that confirms PCOS.

A doctor usually considers symptoms, medical history, physical examination and appropriate investigations. Other conditions that can cause similar symptoms need to be excluded.

In adults, PCOS is generally diagnosed when at least two of three features are present:

1. Evidence of androgen excess, such as excess facial/body hair, acne, scalp hair thinning or elevated androgen levels
2. Irregular or absent ovulation, usually reflected by irregular menstrual cycles
3. Polycystic ovarian morphology on ultrasound or, in adults, an appropriately interpreted AMH result as an alternative to ultrasound

Importantly, if irregular cycles and evidence of hyperandrogenism are present, an ultrasound is not necessarily required for diagnosis.

Can I test for PCOS at home?

There is currently no reliable home test that can diagnose PCOS.

Home ovulation kits, period-tracking apps and other tests may provide useful information about your cycle, but they cannot establish a PCOS diagnosis.

If you have irregular periods, persistent acne, excessive facial hair, unexplained hair loss or difficulty becoming pregnant, it is better to consult a gynaecologist or endocrinologist for a proper assessment.

Does PCOS go away on its own?

PCOS is generally considered a long-term condition rather than something that simply disappears.

However, symptoms can become less noticeable or change over time. Menstrual and reproductive symptoms may change with age and eventually with menopause, but PCOS-related metabolic risks can remain relevant.

This is why the goal is not simply to “cure” PCOS but to manage its symptoms and reduce associated health risks.

Does PCOS get better with age?

Some symptoms may become less prominent with age, particularly after the reproductive years. However, that does not necessarily mean the underlying health risks disappear.

PCOS is associated with metabolic risks throughout life, so maintaining a healthy lifestyle and having appropriate medical check-ups remain important.

How long will PCOS last?

PCOS can be a lifelong condition. Symptoms may change throughout a woman’s life, and treatment needs can change as well.

For example, the focus may be on menstrual regulation and acne during one stage of life, fertility during another, and metabolic health later on.

How did I suddenly get PCOS?

PCOS usually does not develop because of one meal, one stressful week or one lifestyle mistake.

Its exact cause is not known, but genetics, hormonal factors and insulin-related metabolic changes are thought to play important roles. Symptoms may become noticeable suddenly even though the underlying tendency has been present for some time.

Changes in weight, stress, sleep, medications and other health conditions can also influence menstrual cycles and make symptoms more noticeable. A sudden change in periods therefore deserves assessment rather than automatically being labelled PCOS.

What foods should I avoid with PCOS?

There is no single PCOS diet that everyone must follow. Current international guidance emphasises healthy eating and sustainable lifestyle habits rather than one specific diet.

Instead of focusing on a long list of forbidden foods, try to limit:

• Sugary drinks
• Excess sweets and desserts
• Highly refined carbohydrates
• Highly processed snack foods
• Frequent deep-fried foods
• Large portions of refined grains
• Foods high in added sugars

Build meals around vegetables, pulses, whole grains, protein sources, nuts and seeds, and minimally processed foods.

Can I eat roti in PCOS?

Yes. Roti does not have to be eliminated because you have PCOS.

Whole-wheat roti can fit into a balanced PCOS-friendly diet. Portion size, what you eat with the roti and your overall dietary pattern matter.

For example, roti combined with dal, vegetables, curd or another suitable protein source is generally more balanced than eating several rotis with a sugary or highly processed accompaniment.

Which fruits are not good for PCOS?

There is no standard list of fruits that women with PCOS must completely avoid.

Whole fruits such as apples, guava, oranges, berries, papaya and other fruits can be part of a balanced diet. Whole fruit also provides fibre, vitamins and other nutrients.

The bigger concern is usually excessive added sugar and highly processed foods rather than naturally occurring sugar in whole fruit.

Fruit juices and sweetened fruit drinks are less preferable because they can provide a large amount of sugar with much less fibre than whole fruit.

How to manage PCOS at home?

Daily habits can make an important contribution to PCOS management.

Focus on regular physical activity

Walking, strength training, cycling, swimming, yoga or other activities you enjoy can be useful. The best exercise is one you can continue consistently.

Build balanced meals

Include vegetables, adequate protein, fibre-rich carbohydrates and healthy fats. You do not necessarily need an extremely restrictive diet.

Prioritise sleep

Poor sleep can make it harder to manage weight, appetite and overall metabolic health.

Monitor your menstrual cycle

Keep a record of period dates, cycle length and symptoms. This can be useful information for your doctor.

Look after your mental health

Stress, anxiety, depression and body-image concerns can accompany PCOS. They deserve proper attention and treatment when necessary.

International guidelines recommend lifestyle intervention for women with PCOS and note that healthy lifestyle benefits can occur even without weight loss.

How to lose 20 kg with PCOS?

Losing 20 kg should not be approached as a special “PCOS crash diet.”

If weight loss is medically appropriate, the safest approach is usually gradual and sustainable. A healthcare professional can help determine an appropriate calorie deficit based on your current weight, nutritional needs, activity level and medical history.

A useful approach includes:

• Creating a sustainable calorie deficit
• Eating adequate protein and fibre
• Choosing minimally processed foods
• Limiting sugary drinks and excess added sugar
• Performing regular aerobic activity
• Including resistance training where appropriate
• Getting sufficient sleep
• Tracking progress over months rather than weeks

Importantly, PCOS management is not successful only when the weighing scale changes. The 2023 international guideline highlights improvements in metabolic health and central adiposity and recognises that healthy lifestyle changes can provide benefits even without weight loss.

If substantial weight loss is required, a doctor or dietitian can also discuss evidence-based weight-management treatments where appropriate.

What is the best treatment for PCOS?

There is no single best treatment for every woman with PCOS. Treatment depends on symptoms, health risks, age and whether pregnancy is currently desired.

Treatment may include:

Lifestyle management: Healthy eating, physical activity, sleep and sustainable weight management form an important foundation.

Hormonal contraceptives: Combined oral contraceptive pills may be used to regulate periods and help manage androgen-related symptoms such as acne and excess hair growth when appropriate.

Metformin: This medication may be particularly useful when metabolic problems such as insulin resistance or increased diabetes risk are present.

Treatment for excess hair: Depending on the individual, cosmetic methods, laser hair reduction or medications may be considered.

Fertility treatment: If pregnancy is desired and ovulation is irregular, medicines can help induce ovulation. Letrozole is recommended as first-line pharmacological ovulation induction for anovulatory infertility associated with PCOS in the international guideline.

The treatment plan should therefore be individualised rather than based simply on the ultrasound appearance of the ovaries.

Can I marry a girl with PCOS?

Yes. PCOS is a medical condition, not a reason that a woman cannot have a relationship, marriage or family.

Some women with PCOS may experience fertility difficulties, but PCOS does not mean infertility. Many women with PCOS become pregnant, either naturally or with appropriate treatment when needed.

A supportive relationship should focus on the person rather than defining her by a medical diagnosis.

Can PCOS affect a male partner?

PCOS does not spread from one person to another and does not directly cause PCOS in a male partner.

However, if a couple is having difficulty conceiving, both partners’ fertility can be assessed. Fertility is a couple-level issue, and male factors can contribute independently.

PCOS may affect ovulation in the female partner, but that does not mean the male partner has been “affected” by PCOS itself.

Can I live a long life with PCOS?

Yes. PCOS does not mean that a woman cannot live a long and healthy life.

Because PCOS is associated with increased risks of metabolic conditions, however, long-term health deserves attention. Depending on the individual, this may include monitoring blood pressure, blood glucose, cholesterol, weight or waist measurements and other risk factors.

The earlier associated problems are identified, the easier it can be to address them.

Frequently asked questions about PCOS

Is PCOS caused by eating too much sugar?

No. Eating sugar does not by itself cause PCOS. PCOS has complex genetic, hormonal and metabolic contributors. However, a diet high in added sugar can contribute to excess calorie intake and metabolic problems, so reducing it can be beneficial.

Does every woman with PCOS have ovarian cysts?

No. Ovarian cysts are not required for a PCOS diagnosis. The condition can be diagnosed based on other features even when the ovaries do not have a polycystic appearance.

Does PCOS always cause infertility?

No. PCOS can make conception more difficult because ovulation may not occur regularly, but many women with PCOS become pregnant.

Can PCOS affect the skin?

Yes. Acne and oily skin are common manifestations of androgen excess. Some women may also develop darkened skin patches, particularly around the neck and other folds, or skin tags.

Is PCOS only a reproductive problem?

No. PCOS can affect reproductive, metabolic, dermatological and psychological health. This is why comprehensive management is important.

When should you see a doctor?

Consider speaking to a gynaecologist or endocrinologist if you have:

• Periods that are consistently irregular or absent
• New or excessive facial/body hair
• Persistent acne that does not respond to usual treatment
• Unexplained scalp hair thinning
• Significant unexplained weight changes
• Difficulty becoming pregnant
• Signs of insulin resistance or abnormal blood sugar
• Concerns about PCOS based on symptoms or an ultrasound report

Do not self-diagnose PCOS from an ultrasound report alone. A proper diagnosis requires looking at the complete clinical picture and excluding other conditions that can produce similar symptoms.

Final thoughts

PCOS can be frustrating, particularly when symptoms affect periods, appearance, weight or fertility. But a diagnosis of PCOS does not define a woman’s health or her future.

The condition is highly individual. One woman may primarily need help regulating her periods, another may need treatment for acne or excess hair, while someone trying to conceive may need support with ovulation. Others may need greater attention to blood sugar, cholesterol, blood pressure or weight management.

The most useful approach is therefore individualised PCOS care rather than a one-size-fits-all treatment plan. Healthy eating, regular physical activity and attention to emotional wellbeing form the foundation, while medicines and fertility treatments can be added when appropriate. Current international guidance supports this broader, long-term approach to PCOS management.

If you have symptoms of PCOS, an early medical evaluation can help identify the cause of your symptoms and create a treatment plan suited to your needs.

Note: This article is for general health information and does not replace consultation with a qualified doctor.