PMS that comes and goes
Informed by recognized medical guidance
Overview
PMS (premenstrual syndrome) is a group of symptoms that some people get in the days before their period starts. ‘Comes and goes’ means the symptoms may be different from month to month, or some months you may have few or no symptoms at all.
Key facts
- PMS is linked to natural hormonal changes that happen during your menstrual cycle.
- Symptoms usually improve once your period begins or shortly after.
- PMS is not a sign of weakness or something you just have to put up with.
Yes, it is very common. Most people who menstruate will have at least some PMS-like symptoms at some point in their lives.
It mainly affects people who ovulate and menstruate, especially those in their 20s to early 40s. It can also affect teenagers after they start having periods and continue until menopause.
Symptoms
- Sudden, severe pelvic or abdominal pain that does not go away
- Very heavy bleeding (soaking through a pad or tampon every hour)
- Fainting or feeling like you are about to pass out
- ⚠Bleeding that is much heavier than usual for you
- ⚠A period that lasts much longer than normal
- ⚠Pain that gets worse over time or does not ease with rest
Common symptoms
- Bloating or a heavy feeling in the belly
- Tender or swollen breasts
- Mood swings, irritability, or feeling unusually emotional
- Tiredness or low energy
- Headaches
- Food cravings (often for sweets or salty snacks)
Symptoms in children
- Teenagers who have started having periods may notice similar PMS symptoms, including cramping, moodiness, and acne.
Symptoms in older adults
- In perimenopause (the years leading up to menopause), PMS symptoms can change, sometimes becoming more intense or appearing at different times of the cycle.
Causes
Main causes
- Natural changes in the levels of oestrogen and progesterone during the menstrual cycle.
- Changes in brain chemicals (such as serotonin) that affect mood and energy.
- Stress, poor sleep, and other lifestyle factors can make symptoms more noticeable.
Risk factors
- High levels of stress
- Not getting enough physical activity
- Poor diet, especially a diet high in salt, sugar, and processed foods
- A personal or family history of depression or anxiety
When to see a doctor
See a doctor urgently if:
- If you have sudden, severe pain or very heavy bleeding, call your local emergency number right away.
Book a routine appointment if:
- If PMS symptoms are interfering with your school, work, or relationships
- If you feel very low, hopeless, or anxious in the weeks before your period
- If you want support to manage symptoms better
Diagnosis
There is no simple blood test or scan for PMS. A doctor will usually diagnose it by talking to you about your symptoms and their pattern over time.
Tests that may be done
- A symptom diary where you track your symptoms and your period for at least two months
- In some cases, thyroid function tests or other blood tests to rule out conditions that can mimic PMS
What to expect at your appointment
Your doctor will ask about your symptoms, how they affect your life, and when they happen. They may ask you to fill in a diary for a couple of months. This helps confirm whether your symptoms line up with your menstrual cycle.
Treatment
Treatment focuses on easing symptoms and supporting your overall health. It often involves self-care first, and then, if needed, your doctor may suggest other approaches.
Self-care at home
- Keep a symptom diary to notice patterns and plan ahead
- Aim for regular, gentle exercise like walking or stretching
- Try stress-reducing activities like breathing exercises, meditation, or talking to a friend
- Cut back on salt, caffeine, and alcohol in the week before your period
- Try to get enough sleep and keep a regular sleep schedule
Medical treatments
If self-care isn't enough, your doctor might discuss options such as hormonal birth control, cognitive behavioural therapy (CBT), or medicines that can help with mood or pain. They will explain the benefits and risks so you can decide together what is right for you. Never start a new treatment without speaking to a qualified healthcare provider.
When is surgery considered?
Surgery is not a routine treatment for PMS and is very rarely considered. Any surgical option would only be discussed after all other treatments have been tried and only with a specialist.
Living with this condition
Living with PMS that comes and goes is easier when you notice your own patterns. If you know that certain weeks are tougher, you can plan lighter activities, ask for help with tasks, and be extra kind to yourself.
Lifestyle tips
- Stay physically active throughout the month, not just before your period
- Make time for rest and relaxation
- Talk openly with people you trust about how you are feeling
- Set small, realistic goals for stressful days
Diet and exercise
Eating a balanced diet with plenty of vegetables, whole grains, and lean protein can help. Try to limit salty snacks and sugary drinks, and choose water as your main drink. Regular movement, even a short daily walk, can lift your mood and reduce bloating.
Mental health and emotional wellbeing
PMS can affect your emotions. It is normal to feel more tearful or easily frustrated. If you feel very down, anxious, or have thoughts of harming yourself, please reach out for help right away. Talk to your doctor or a mental health professional.
Prevention
PMS cannot always be prevented, but a healthy lifestyle with regular exercise, good sleep, and stress management may reduce how often symptoms appear and how strong they feel.
Vaccines
Vaccines do not prevent PMS. It is a natural part of the menstrual cycle.
Screening programmes
There is no routine screening test for PMS. The most important 'screening' is paying attention to your own cycle and telling your doctor about changes that worry you.
Complications
If left untreated
- PMS can strain your relationships or work life if it is severe and you don't get help.
- In some people, PMS can overlap with a more severe condition called PMDD (premenstrual dysphoric disorder), which causes much more intense emotional symptoms.
Long-term outlook
For most people, PMS is manageable. With the right self-care, support, and medical guidance, you can reduce how much it interferes with your life. Even if your symptoms come and go, there are strategies to help you feel more in control.
Find support
Local organisations
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Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
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Sources and guidance
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 31, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.