PCOS Symptoms: 12 Signs to Watch (and Why They Vary So Much)
The most common PCOS symptoms, from irregular periods and acne to cravings and hair changes, why they differ from person to person, and when to see a doctor.
Polycystic ovary syndrome (PCOS) is one of the most common hormone conditions in women of reproductive age. The World Health Organization estimates it affects 10–13% of them, and up to 70% don’t know they have it.
Part of the reason it goes unnoticed is that PCOS looks different from person to person. One person has periods that arrive every 60 days and nothing else. Another has regular cycles but struggles with acne and hair growth. Below are the signs worth knowing, grouped by what’s driving them.
Cycle symptoms
These come from ovulation happening late, irregularly or not at all.
- Irregular periods. Cycles shorter than 21 days or longer than 35 days, or big swings from one month to the next.
- Few or no periods. Fewer than eight periods a year, or a gap of more than three months.
- Heavy or long bleeding when a period does arrive, because the uterine lining has had longer to build up.
- Difficulty getting pregnant, since ovulation is unpredictable or absent.
If your cycle length changes by more than a week from month to month, a tracking app that predicts a single date will be wrong most of the time. Track the range instead.
Skin and hair symptoms
These come from higher levels of androgens (hormones such as testosterone that everyone has, usually in small amounts).
- Acne, especially along the jaw, chin and neck, and acne that persists past the teenage years.
- Excess hair (hirsutism) on the face, chest, stomach or back.
- Thinning hair on the scalp, usually at the crown or the part line.
- Oily skin.
- Dark, velvety patches of skin (acanthosis nigricans) on the neck, armpits or groin. These are linked to insulin resistance.
Metabolic and energy symptoms
These are often connected to insulin resistance, which is common in PCOS.
- Weight gain or difficulty losing weight, particularly around the waist.
- Strong sugar cravings and energy crashes after meals.
- Fatigue and brain fog. Sleep problems, including sleep apnoea, are also more common with PCOS.
Mood changes are worth adding too. Anxiety and depression are more common in people with PCOS, and they deserve the same attention as physical symptoms.
Why PCOS symptoms vary so much
PCOS is diagnosed when at least two of these three features are present, after other causes have been ruled out:
| Feature | What it means |
|---|---|
| Irregular or absent ovulation | Long, irregular or missing cycles |
| Higher androgens | Shown on a blood test, or as acne, excess hair or scalp hair loss |
| Polycystic ovaries | Many small follicles seen on ultrasound (or a high AMH blood test in adults) |
Because any two out of three count, two people can both have PCOS and share very few symptoms. Your genes, your body size, your level of insulin resistance and your stage of life all shift which symptoms show up most.
When to see a doctor
Book an appointment if you notice:
- Fewer than eight periods a year, or no period for three months (and you’re not pregnant)
- Bleeding that is very heavy, lasts longer than seven days or happens between periods
- New or worsening hair growth on the face or body
- Acne that doesn’t respond to usual treatments
- Trouble getting pregnant after 6–12 months of trying
Go sooner if hair growth or other changes come on quickly over a few months. That pattern can point to conditions other than PCOS that need prompt testing.
How tracking helps
Symptoms like acne or fatigue are easy to forget by the time you’re in a clinic. Logging them for even one or two cycles gives your doctor something concrete: how long your cycles really are, and which symptoms show up most and when.
In Ovra you can log skin, hair, energy, cravings, mood and pain in about 20 seconds a day. Ovra then shows which phase of your cycle each symptom tends to cluster in. When you’re ready, export a one-page summary for your appointment.
Sources
- World Health Organization, Polycystic ovary syndrome fact sheet
- 2023 International Evidence-based Guideline for the Assessment and Management of PCOS (Teede et al., J Clin Endocrinol Metab, 2023)
- ACOG, Polycystic ovary syndrome (PCOS) FAQ
This article is general education, not medical advice. Check with your doctor before making medical decisions.
Frequently asked questions
What are the first signs of PCOS?
For many people the first sign is irregular or missing periods, often with cycles longer than 35 days. Others first notice acne along the jaw, extra hair on the face or body, or thinning hair on the scalp.
Can you have PCOS with regular periods?
Yes. PCOS is diagnosed when two of three features are present, so someone with regular cycles can still have PCOS if they have signs of higher androgens and polycystic-looking ovaries on ultrasound.
Can you have PCOS without being overweight?
Yes. PCOS occurs across all body sizes. Insulin resistance, one of the drivers of symptoms, is also common in people with PCOS who are not overweight.
This article is general education, not medical advice. It can't diagnose or treat any condition. Talk to a qualified clinician about your symptoms and treatment.