Hormonal health
A complete picture of every system PCOS can affect — from your cycle to your mental health.
PCOS symptoms emerge from two primary disruptions: excess androgens and impaired insulin function. Because both of these affect multiple organ systems, PCOS creates a surprisingly wide range of symptoms — many of which are easily attributed to other causes, contributing to the high rate of underdiagnosis.
Menstrual and reproductive symptoms
Irregular periods
Cycles longer than 35 days, fewer than 8 periods per year, or absent periods (amenorrhea). Often the first and most obvious sign. Caused by unpredictable or absent ovulation.
Difficulty conceiving
Irregular ovulation makes conception harder to time. PCOS is the most common cause of anovulatory infertility — but most women with PCOS can achieve pregnancy with appropriate support.
Heavy bleeding
When periods do arrive, they may be heavier than normal — caused by the uterine lining building up during anovulatory cycles without the shedding trigger of regular ovulation.
Pelvic pain
Some women with PCOS experience pelvic discomfort or pain, particularly around the time ovulation might have occurred. Pain with heavy menstrual bleeding is also reported.
Androgen (high male hormone) symptoms
Hirsutism
Excess hair growth in a male pattern — upper lip, chin, neck, chest, abdomen, or inner thighs. Affects approximately 70% of women with PCOS. Caused by elevated testosterone acting on hair follicles.
Oily skin
Excess sebum production from androgen stimulation makes skin chronically oily. Often accompanies hormonal acne.
Acne
Adult hormonal acne, typically along the jawline, chin, and neck. Caused by excess androgens stimulating sebum (oil) production. Often persists beyond adolescence in PCOS.
Female-pattern hair loss
Thinning of scalp hair, particularly at the crown and temples — a pattern similar to male-pattern baldness. Affects 40–70% of women with PCOS. Detailed in the hair loss sub-article below.
Metabolic and systemic symptoms
Insulin resistance
Present in 50–80% of women with PCOS regardless of weight. Causes fatigue after eating, carbohydrate cravings, difficulty losing weight, and elevated blood sugar. Central to many of PCOS's long-term health risks.
Sugar and carbohydrate cravings
Insulin resistance causes blood sugar spikes and crashes, triggering intense cravings for carbohydrates and sugar. A frustrating and often unrecognised symptom.
Weight gain
Particularly around the abdomen — driven by insulin resistance and androgen excess. Not all women with PCOS are overweight; lean PCOS affects a significant proportion. But excess weight worsens insulin resistance.
Fatigue
Chronic fatigue is extremely common in PCOS — driven by insulin resistance, sleep disruption (including sleep apnoea), low-grade inflammation, and the psychological burden of managing a chronic condition.
Skin and external symptoms
Acanthosis nigricans
Dark, velvety patches of skin in body folds — neck, armpits, groin. A direct marker of insulin resistance. Often the first visible sign that insulin is not functioning normally.
Darkening of skin
Beyond acanthosis nigricans, some women with PCOS notice generalised skin darkening, particularly in sun-exposed areas.
Skin tags
Small benign growths of skin, particularly in areas of friction. Associated with insulin resistance in PCOS.
Scalp conditions
Dandruff and seborrheic dermatitis are more common in PCOS due to excess sebum production driven by androgens.
Mental health symptoms — the most overlooked
Research consistently shows that women with PCOS have significantly higher rates of anxiety, depression, eating disorders, and poor self-esteem compared to women without PCOS. These are not simply reactions to living with a difficult condition — they reflect direct hormonal effects on brain chemistry. Androgen excess affects mood regulation, and insulin resistance disrupts energy metabolism in the brain. PCOS-related mental health symptoms are underdiagnosed, undertreated, and critically underrepresented in PCOS care pathways.
WHEN TO SEE A DOCTOR
See a healthcare provider if you have: fewer than 8 menstrual cycles per year or cycles consistently longer than 35 days; visible signs of excess androgens (hirsutism, adult acne, scalp hair thinning); difficulty conceiving after 6–12 months of trying; unexplained weight gain around the abdomen; or fatigue, cravings, and blood sugar symptoms. A diagnosis requires at minimum a pelvic examination, blood tests for androgens and hormones, and an ultrasound.
