Irregular Periods: What’s Normal, What’s Not and When to Seek Help

Periods… for some, they arrive like clockwork, while for others they can be irregular, heavy, light or completely unpredictable. If your cycle changes in timing, duration or flow, from month to month, you may be experiencing irregular periods. While this can sometimes be a normal response to hormonal changes, it may also be a sign of an underlying health condition that’s worth exploring.

What causes irregular periods

There are many potential factors behind irregular periods, ranging from everyday lifestyle influences to broader health considerations. Stress, changes in exercise routines, weight fluctuations and conditions such as hormonal imbalances can all play a role.

Polycystic Ovary Syndrome (PCOS)

PCOS is one of the most common hormonal conditions affecting women and can disrupt regular ovulation, often leading to irregular or missed periods. It can also cause a range of other symptoms, including excess facial or body hair, persistent acne and difficulty conceiving. Some women may also notice weight gain or thinning hair on the scalp.

Endometriosis

Endometriosis is commonly associated with painful, heavy, or disruptive periods, although symptoms can vary from person to person. While it may sometimes be linked with irregular cycles, it is more often recognised through ongoing period pain, pelvic discomfort, or pain during sex or bowel movements, particularly around menstruation.

Because symptoms can overlap with other conditions, diagnosis is not always straightforward. If your periods feel increasingly painful, unpredictable, or different from your normal pattern, it’s important to seek medical advice and not dismiss the changes

Thyroid Disorders (Underactive or Overactive)

Your thyroid helps regulate hormones. If it’s underactive, periods may be heavier and less frequent; if overactive, they may be lighter or stop altogether. Look out for fatigue, weight changes, or sensitivity to temperature.

Stress

Ongoing stress can interfere with hormone production, leading to delayed or missed periods. It often comes with sleep issues, anxiety, or low energy.

Excessive Exercise

Intense exercise - especially when combined with not eating enough - can suppress ovulation and lead to irregular or missed periods. Fatigue and unintended weight loss can also be warning signs.

Lifestyle Factors

Changes in weight, restrictive diets, or certain medications can all affect your cycle by disrupting hormone balance.

When your concerns are dismissed without answers

For many women, these symptoms are too easily brushed off. Concerns about irregular periods are often attributed to “hormones”, stress, or anxiety without deeper investigation. This can leave you feeling dismissed and unsure whether what you’re experiencing is being taken seriously.

Persistent irregularities shouldn’t be ignored. You know your body best and if something feels off, trust that instinct - it’s reason enough to seek further answers.

Our specialist women’s health consultants are experienced in supporting women who come to us for second opinions after feeling dismissed or not fully heard by their GP.

“After feeling so low and wondering if a second baby would happen for us, we feel really lucky to have had our baby boy, Luca, so quickly and we will be forever grateful to Mr Maiti. I would not hesitate to recommend Mr Maiti and Pall Mall to anyone in a similar position - we didn’t know what to expect but couldn’t be happier with the service we received.”

“It feels really reassuring to be heard - to know it’s not just in my head and that I do have endometriosis.”

Getting answers sooner

Long NHS waiting times can delay diagnosis, leaving many women without clarity or support. At Pall Mall Medical, our consultant-led gynaecology service is designed to give you faster, clearer answers - with expert care guiding you from your first appointment through to diagnosis and treatment.

Fast access: Get the care you need, when you need it most, with appointments available within 1–2 days and no GP referral required.
Same day diagnostics: We can carry out ultrasounds, blood tests, scans and other investigations during your consultation - so there’s no delay in understanding what’s going on.
Expert Gynaecologists: Led by Mr. Maiti, our senior GMC-certified gynaecologist, alongside a team of experienced female consultants dedicated to high-quality care.
Personalised care plans: If you’ve felt dismissed or overlooked before, our approach is different. We take time to listen and create a plan tailored to you.
Compassionate support: We look after both your physical and emotional wellbeing, offering care that is kind, honest and completely discreet.

Many of our patients come to us after struggling to get answers elsewhere, and tell us they finally felt listened to and supported throughout their care. As some of our patients shared:

“I had my results back a few days later along with a clear, concise treatment plan developed by Mr Maiti himself. Within a couple of weeks, I was back to my normal routine thanks to the quick actions from Mr Maiti and his team. I received amazing service and quality care – I’d recommend to anyone!”

“I had a copper coil replacement done here and was met by a lovely nurse who kindly held my hand throughout the whole procedure. Dr Khan was professional and highly competent, and did the whole process quicker than I expected which helped with the pain. So happy I came here - the whole booking process was also very smooth, they offered me the first weekend that I requested, no issues.”

“What a great service from start to finish! I wasn’t happy waiting for 12 weeks for an NHS scan so I booked with PM and was saw within 2 days and had results within a further 2 days. I wouldn’t hesitate to use the service again. Reassuring/ peace of mind that you can’t put a price on.”

Irregular periods are common but they’re also your body’s way of telling you something may not be right.. Don’t ignore it - getting checked by a specialist can help you understand what’s going on and take the next step with confidence.

If you’re concerned about your periods or would like to speak to a GP, you can book a private, discreet appointment today by using our online enquiry form or call 0161 832 2111.