Published by Bupa's Health Information Team, October 2011.
This factsheet is for women who have premenstrual syndrome (PMS), or who would like information about it.
PMS is a mixture of physical and emotional symptoms that some women have during the days, or sometimes weeks, leading up to their menstrual period.
PMS is common in young and middle-aged women, and three in four women have some PMS symptoms. It usually starts in the second half of your menstrual cycle and goes away by the time your period starts.
Older teenage girls tend to have more severe symptoms than younger teenage girls, and women in their 40s tend to be affected most severely.
PMS can range in severity from mild to severe. Mild PMS causes some discomfort, but doesn’t interfere with your life. If you have moderate PMS, your symptoms interfere with your personal, social and professional life, but you’re still able to function each day, although maybe not to your usual level. If you have severe PMS, your symptoms are so severe that the condition affects your quality of life and relationships.
A more severe form of PMS is premenstrual dysphoric disorder. Emotional symptoms, such as mood swings, depression and irritability, are more common in premenstrual dysphoric disorder and the condition can interfere significantly with your everyday life. It affects between three and eight women in every 100.
There are many symptoms associated with PMS. The most common symptoms can be grouped into emotional and physical symptoms.
Emotional and behavioural symptoms can include:
Physical symptoms can include:
These symptoms aren't unique to PMS – it's the timing of the symptoms that indicate if you have the condition. If you have PMS, your symptoms will:
If you have premenstrual dysphoric disorder, your symptoms will be similar to those for PMS, but they will be more severe.
These symptoms may be caused by problems other than PMS and premenstrual dysphoric disorder. If you have any of these symptoms, see your GP for advice.
The exact reasons why you may get PMS aren't fully understood at present.
One theory is that getting PMS means you're particularly sensitive to the varying levels of hormones in your body at certain times of the month. It's possible that these hormones also interact with your brain's mood-controlling chemicals (serotonins).
Another theory is that PMS may to be related to disturbances in the levels of certain fatty acids in your body.
There are also certain factors that can make you more likely to get PMS. For example, if you’re obese and don’t exercise, you’re three times more likely to get PMS. If you smoke, you double your risk of having more severe PMS symptoms.
If you think you have PMS, keep a diary of your symptoms for two menstrual cycles before you visit your GP. This will help to see if your symptoms are related to your menstrual cycle.
Your GP will ask about your symptoms and examine you. He or she may also ask you about your medical history.
There are no specific tests that can diagnose PMS. Your GP will usually make a diagnosis based on your description of your symptoms and when they occur.
It's important to distinguish between PMS and other problems that could be causing similar physical or emotional symptoms. Your GP may ask you to have some blood or urine tests to rule out other illnesses that could be causing your symptoms.
There isn’t a cure for PMS, but there are a number of treatments that can help relieve your symptoms. Continue to use a diary to record your symptoms to see if your treatment is effective.
If you keep a symptom diary, you may find that your physical or emotional symptoms are linked with your period. You can then predict more accurately how you will feel at certain times of the month. This may help you to plan your time so you can try, wherever possible, to prevent being in stressful situations on key days and pinpoint any emotional triggers that make your symptoms worse.
Regular exercise may help to improve your symptoms. Aim to do at least 150 minutes (two and a half hours) of moderate intensity physical activity during the week.
Your GP may advise you to eat a healthy, balanced diet that's low in saturated fat, sugar and salt, and high in fibre, vegetables and fruit. You may also find that eating smaller meals more regularly throughout the day when you have PMS will help to reduce your symptoms.
Some research suggests that reducing the amount of salt you eat may minimise the bloated feeling and tender breasts that you may have with PMS. Other studies recommend limiting caffeine because it's related to premenstrual irritability and insomnia. However, more research is needed to prove these effects.
There is no scientific evidence to say that taking vitamin B6 supplements is helpful for PMS, and high doses can damage your nervous system.
If you have pain from premenstrual headaches, backache or other aches and pains, you can take over-the-counter painkillers, such as ibuprofen or aspirin. Always read the patient information leaflet that comes with your medicine and if you have any questions, ask your pharmacist for advice.
If you have symptoms that disrupt your life, and don't improve with self-help measures or painkillers, see your GP for advice. He or she may prescribe medicines, depending on the type of symptoms you have. Some of these are listed below.
If you have severe PMS, cognitive behavioural therapy (CBT) is a treatment option. This is a short-term psychological treatment. It helps to challenge negative thoughts, feelings and behaviours and is often used to treat anxiety and depression. Ask your GP for more information.
A hysterectomy (removal of the womb) with oophorectomy (removal of the ovaries) is a permanent solution to PMS as it stops your menstrual cycle completely. The procedure is only rarely carried out for PMS.
If you're considering this operation, your GP may suggest an injection of a gonadorelin analogue first to see if this improves your symptoms. If this makes no difference, it means your symptoms aren't linked to your menstrual cycle and therefore it's unlikely that surgery will help.
Research on whether complementary therapies, such as herbal remedies, can improve symptoms of PMS is conflicting and there is little scientific evidence. If you’re considering a complementary therapy for PMS, ask your GP or pharmacist for advice.
For answers to frequently asked questions on this topic, see Common questions.
For sources and links to further information, see Resources.
This information was published by Bupa's Health Information Team and is based on reputable sources of medical evidence. It has been reviewed by appropriate medical or clinical professionals. Photos are only for illustrative purposes and do not reflect every presentation of a condition. The content is intended only for general information and does not replace the need for personal advice from a qualified health professional. For more details on how we produce our content and its sources, visit the About our Health Information page.
Publication date: October 2011
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