Diseases & care
PMS and PMDD explained: premenstrual symptoms and help
Many people notice physical and emotional changes in the days before a period. When these are troublesome they are called premenstrual syndrome (PMS); when they are severe and seriously affect daily life, it may be premenstrual dysphoric disorder (PMDD). Both are real and treatable, and understanding them is the first step to getting help.
Education and reference only. This article explains how treatments work in plain language — it contains no doses and is not a substitute for advice from your doctor or pharmacist. Always discuss your own treatment with a qualified clinician.
What PMS is
Premenstrual syndrome describes symptoms that appear in the one to two weeks before a period and settle once the period starts. Symptoms vary widely and can include mood swings, irritability, low mood or anxiety, tiredness, bloating, breast tenderness, headaches and changes in appetite or sleep. They are thought to arise from the way the body responds to the normal hormonal changes of the menstrual cycle, rather than from abnormal hormone levels. Most people have some premenstrual symptoms; PMS is when they are troublesome.
When it is PMDD
Premenstrual dysphoric disorder is a severe form in which emotional symptoms — marked low mood, anxiety, irritability or a sense of being overwhelmed — are intense enough to seriously disrupt relationships, work or daily life, and reliably lift after the period starts. PMDD is recognised as a distinct condition and deserves proper assessment and treatment. Keeping a symptom diary across two or three cycles helps confirm the pattern and distinguishes it from other mood conditions.
Self-care and lifestyle
For milder PMS, regular exercise, good sleep, stress management, and reducing caffeine, alcohol and salt can help, along with a balanced diet. Some people find relaxation techniques or talking therapies useful for the emotional symptoms. Tracking symptoms helps you anticipate the tough days and plan around them. These measures are worthwhile first steps and can meaningfully reduce the impact for many people.
Treatments that help
When symptoms are more severe, effective treatments exist and are discussed with a clinician. These can include certain hormonal approaches (for example some combined contraceptives), specific antidepressant medicines that are particularly helpful for premenstrual mood symptoms, and cognitive behavioural therapy. PMDD in particular often responds well to treatment. The key message is that severe premenstrual symptoms are not something to simply endure — help is available, so it is worth seeing a GP.
In short
Key takeaways
- PMS is troublesome physical and emotional symptoms in the days before a period that settle once it starts.
- PMDD is a severe form where emotional symptoms seriously disrupt daily life.
- They arise from the body's response to normal hormonal cycles, not from abnormal hormone levels.
- A symptom diary over two to three cycles helps confirm the pattern.
- Self-care helps milder PMS; severe symptoms and PMDD often respond well to treatment — see a GP.
Answers
Frequently asked questions
What is the difference between PMS and PMDD?
PMS is troublesome premenstrual symptoms; PMDD is a severe form where intense emotional symptoms seriously disrupt daily life and reliably lift after the period starts. PMDD deserves proper assessment and treatment.
How is it diagnosed?
There is no single test. Keeping a symptom diary across two or three menstrual cycles, showing symptoms tied to the premenstrual phase, is the key way to confirm the pattern.
Can it be treated?
Yes. Options range from lifestyle changes for milder symptoms to hormonal approaches, specific antidepressants and CBT for more severe PMS or PMDD. It is worth seeing a GP rather than simply enduring it.
Go deeper
Related guides
Sources
Where this is drawn from
- Royal College of Obstetricians and Gynaecologists — Premenstrual syndrome
- NICE CKS — Premenstrual syndrome
- NHS — PMS (premenstrual syndrome)
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