PCOS symptoms and how to track them (a practical guide)

PCOS — polycystic ovary syndrome, increasingly called PMOS (polycystic metabolic ovarian syndrome) to reflect its metabolic side — is one of the most common hormonal conditions in people who menstruate. It touches the cycle, the skin, the hair, metabolism and mood, often all at once. That breadth is exactly why it can feel so hard to pin down. Consistent, low-effort tracking is one of the most useful things you can do: not to diagnose yourself, but to see your own patterns and bring a clear picture to your clinician.

What is PCOS (PMOS)?

PCOS is a hormonal and metabolic condition. Most clinicians diagnose it using the Rotterdam criteria, which require at least two of three features: irregular or absent ovulation, signs of elevated androgens (either on a blood test or from symptoms like acne or excess hair), and polycystic-appearing ovaries on ultrasound. Notably, you do not need visible ovarian cysts to have PCOS — the name is a little misleading, which is part of why "PMOS" is gaining ground.

Only a doctor can diagnose PCOS. An app can help you notice and record what your body is doing — it cannot confirm or rule out the condition.

The most common symptoms

Irregular, long or missing cycles

Cycles longer than 35 days, fewer than about 8 periods a year, or unpredictable timing are among the most common signs, driven by irregular ovulation.

Signs of higher androgens

Persistent acne (often along the jaw and chin), oily skin, excess hair on the face or body (hirsutism), or thinning hair at the scalp can all reflect higher androgen activity.

Weight and metabolic changes

Many — though not all — people with PCOS experience weight gain that's hard to shift, or insulin resistance, which can show up as energy dips, cravings or skin changes (like darkened patches called acanthosis nigricans).

Mood, energy and sleep

Anxiety, low mood and fatigue are more common with PCOS. They're real symptoms worth logging, not side notes.

Fertility questions

Because PCOS affects ovulation, it's a common reason people seek help conceiving — though many people with PCOS conceive, with or without support.

"PCOS is a spectrum. Two people can have the same diagnosis and almost none of the same day-to-day symptoms. That's why your own record matters more than any average."

Which symptoms are worth tracking

You don't need to track everything. A useful core set:

• Cycle dates — the start of each period, so you can see length and regularity over time.
• Skin and hair — a quick note or rating when acne flares or hair changes, ideally tagged to where you are in your cycle.
• Weight and energy — occasional, calm check-ins rather than daily weigh-ins.
• Mood — a simple scale is enough to reveal a trend.
• Anything you're trialling — a supplement, a medication, a routine change — so you can see whether your numbers actually move.

A simple way to log them

The best system is the one you'll keep. Aim for a couple of taps, not a daily essay. Log the cycle start when it happens; add a symptom rating when something flares; note a lab result when you get one. Over a few weeks and months, an app like PMOSly can quietly line these up — cycle regularity over time, symptoms by cycle phase, weight against how you feel — so you (and your doctor) can spot what's actually connected. All of this is informational: it surfaces patterns, it doesn't diagnose or treat.

When to see a doctor

See a healthcare professional if your cycles are consistently irregular or absent, if acne or hair changes are distressing, if you're planning a pregnancy, or if you're worried about your metabolic health. Bring your log — cycle history and symptom trends make appointments far more productive.