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Periods & cycle problems

Heavy, painful, irregular or missing periods are common, but they're not something you have to put up with. Your cycle is a sign of your overall health, and food can play a real part in getting it back on track.

Reviewed by our medical team6 minute readUpdated month 2026

What's a typical cycle?

21 to 40
Days between periods28 is the average, but anywhere in this range is common
2 to 7
Days of bleedingUsually heaviest in the first two days
Regular
Your own patternA big change from what's normal for you is worth checking

Common period problems

Your period is often called your fifth vital sign. When it changes, it's your body telling you something.

Heavy periods

  • Changing pads or tampons every one to two hours
  • Passing large clots
  • Bleeding for more than seven days
  • Feeling tired, dizzy or breathless

Painful periods

  • Pain that painkillers don't help
  • Missing work, school or plans
  • Pain during sex or between periods

Irregular periods

  • Hard to predict when your period will come
  • Some cycles much shorter or longer than others
  • Spotting between periods

Missing periods

  • Can follow stress, weight loss or intense exercise
  • Can be linked to PCOS, thyroid or early menopause

See a doctor promptly if you have bleeding after sex, between periods or after menopause, very heavy bleeding with dizziness, sudden severe pain, or if you could be pregnant.

What can cause period problems?

There's usually a reason, and finding it is the first step to feeling better.

Hormones

Conditions of the womb

Lifestyle

How food can help your cycle

Your cycle is closely linked to how well your body is fuelled. We look closely at your micronutrients and eating habits, because research shows food can make a real difference to many period problems. Some nutrients play a direct role: vitamin B6 contributes to the regulation of hormonal activity, and iron contributes to the reduction of tiredness and fatigue.

For heavy periods

Iron and vitamin C

✓ Well established

For period pain

Omega 3, vitamin D and ginger

For missing periods

Eating enough

✓ Well established

For irregular periods with PCOS

Steady blood sugar

Personalised to you

Your cycle friendly eating plan

There's no one size fits all. Our nutritionist builds your plan around your cycle, your symptoms, your test results and the foods you enjoy, so it actually works for you.

How we can help

We bring medical care and nutrition together in one plan, to find the cause of your period problems and help your cycle get back on track.

Medical care

From our doctor

  • A full review of your cycle and symptoms
  • Blood tests, such as iron stores, thyroid and hormones
  • Treatment options for heavy and painful periods, including hormonal options
  • Clear guidance on next steps if you need further tests

Nutrition support

From our nutritionist

  • Find and fix gaps in iron, vitamin D, B vitamins and omega 3
  • Eating enough to fuel a healthy cycle
  • Steady blood sugar for more regular periods
  • An anti-inflammatory style of eating to support period pain
  • Realistic, kind support with weight changes

Your plan looks at five areas together, not just your hormones:

  1. Hormones
  2. Nutrition
  3. Movement
  4. Sleep
  5. Stress

Getting ready for your appointment

A simple period diary for a month or two makes your appointment far more useful:

  • The dates your periods start and end
  • How heavy each day is, and if you pass clots
  • Pain levels, from 0 to 10
  • Any bleeding between periods or after sex
  • Other symptoms, such as tiredness, mood changes or bloating

Your first appointment

An unhurried 60 minute consultation, online or in person. We'll go through your cycle, your symptoms and your health history, explain what might be happening in plain English, and give you a written plan for treatment and nutrition.

“My mum was told it was just her age for years. We started Menopause Angels so that you're listened to the first time.”
— The Menopause Angels team
★★★★★
“My periods were so heavy I'd plan my week around them, and I was exhausted all the time. The team found my iron was really low, sorted my treatment and changed how I eat. I've got my energy back and my periods don't rule my life anymore.”
Leanne, 42, St Helens · Heavy periods patient

Common questions

How do I know if my periods are too heavy?

If you need to change your pad or tampon every one to two hours, pass large clots, bleed for more than seven days, or your periods stop you doing everyday things, they're likely heavier than they should be. Heavy periods can also leave you low in iron, which makes you tired, so it's worth getting checked.

Can diet make my periods more regular?

It can help. Eating enough is key, because under eating is a common reason periods become irregular or stop. If you have PCOS, keeping your blood sugar steady may help your cycle become more regular. We look at your micronutrients and eating habits as part of your plan.

Could my painful periods be endometriosis?

Possibly. Endometriosis is common, and very painful periods, pain during sex and pain between periods can all be signs. We'll talk through your symptoms with you and explain the next steps, including any further tests you may need.

Why have my periods changed in my 40s?

Changes in your 40s are often a sign of perimenopause, as your hormones start to rise and fall unevenly. Periods can become heavier, lighter, closer together or further apart. It's still worth checking, as other causes like fibroids or thyroid problems are common too. Read about perimenopause ›

Ready to feel like you again?

Book a consultation, or call us and we'll help you choose the right appointment.