|Symptoms||Acne, tender breasts, bloating, feeling tired, mood changes|
|Complications||Premenstrual dysphoric disorder|
|Usual onset||1–2 weeks before menstruation|
|Risk factors||High-salt diet, alcohol, caffeine|
|Diagnostic method||Based on symptoms|
|Treatment||Lifestyle changes, medication|
|Medication||Calcium and vitamin D supplementation, NSAIDs, birth control pills|
|Frequency||~25% of women|
Premenstrual syndrome (PMS) refers to physical and emotional symptoms that occur in the one to two weeks before a woman's period. Symptoms often vary between women and resolve around the start of bleeding. Common symptoms include acne, tender breasts, bloating, feeling tired, irritability, and mood changes. Often symptoms are present for around six days. A woman's pattern of symptoms may change over time. Symptoms do not occur during pregnancy or following menopause.
Diagnosis requires a consistent pattern of emotional and physical symptoms occurring after ovulation and before menstruation to a degree that interferes with normal life. Emotional symptoms must not be present during the initial part of the menstrual cycle. A daily list of symptoms over a few months may help in diagnosis. Other disorders that cause similar symptoms need to be excluded before a diagnosis is made.
The cause of PMS is unknown. Some symptoms may be worsened by a high-salt diet, alcohol, or caffeine. The underlying mechanism is believed to involve changes in hormone levels. Reducing salt, caffeine, and stress along with increasing exercise is typically all that is recommended in those with mild symptoms. Calcium and vitamin D supplementation may be useful in some. Anti-inflammatory drugs such as naproxen may help with physical symptoms. In those with more significant symptoms birth control pills or the diuretic spironolactone may be useful.
Up to 80% women report having some symptoms prior to menstruation. These symptoms qualify as PMS in 20 to 30% of pre-menopausal women. Premenstrual dysphoric disorder (PMDD) is a more severe form of PMS that has greater psychological symptoms. PMDD affects three to eight percent of pre-menopausal women. Antidepressant medication of the selective serotonin reuptake inhibitors class may be used in addition to usual measures for in PMDD.
Signs and symptoms
More than 200 different symptoms have been associated with PMS. Common emotional and non-specific symptoms include stress, anxiety, difficulty with sleep, headache, feeling tired, mood swings, increased emotional sensitivity, and changes in interest in sex.
Physical symptoms associated with the menstrual cycle include bloating, lower back pain, abdominal cramps, constipation/diarrhea, swelling or tenderness in the breasts, cyclic acne, and joint or muscle pain, and food cravings. The exact symptoms and their intensity vary significantly from woman to woman, and even somewhat from cycle to cycle and over time. Most women with premenstrual syndrome experience only a few of the possible symptoms, in a relatively predictable pattern.
While PMS is linked to the luteal phase, the causes of PMS are not clear, but several factors may be involved. Changes in hormones during the menstrual cycle seem to be an important factor; changing hormone levels affect some women more than others. Chemical changes in the brain, stress, and emotional problems, such as depression, do not seem to cause PMS but they may make it worse. Low levels of vitamins and minerals, high sodium, alcohol, and/or caffeine can exacerbate symptoms such as water retention and bloating. PMS occurs more often in women who are between their late 20s and early 40s; have at least 1 child; have a family history of depression; and have a past medical history of either postpartum depression or a mood disorder.
There are no laboratory tests or unique physical findings to verify the diagnosis of PMS. The three key features are:
- The woman's chief complaint is one or more of the emotional symptoms associated with PMS (most typically irritability, tension, or unhappiness). The woman does not have PMS if she only has physical symptoms, such as cramps or bloating.
- Symptoms appear predictably during the luteal (premenstrual) phase, reduce or disappear predictably shortly before or during menstruation, and remain absent during the follicular (preovulatory) phase.
- The symptoms must be severe enough to interfere with the woman's everyday life.
Mild PMS is common, and more severe symptoms would qualify as PMDD. PMS is not listed in the DSM-IV, unlike PMDD. To establish a pattern and determine if it is PMDD, a woman's physician may ask her to keep a prospective record of her symptoms on a calendar for at least two menstrual cycles. This will help to establish if the symptoms are, indeed, limited to the premenstrual time, predictably recurring, and disruptive to normal functioning. A number of standardized instruments have been developed to describe PMS, including the Calendar of Premenstrual syndrome Experiences (COPE), the Prospective Record of the Impact and Severity of Menstruation (PRISM), and the Visual Analogue Scales (VAS).
Other conditions that may better explain symptoms must be excluded. A number of medical conditions are subject to exacerbation at menstruation, a process called menstrual magnification. These conditions may lead the woman to believe that she has PMS, when the underlying disorder may be some other problem, such as anemia, hypothyroidism, eating disorders and substance abuse. A key feature is that these conditions may also be present outside of the luteal phase. Conditions that can be magnified perimenstrually include depression or other affective disorders, migraine, seizure disorders, fatigue, irritable bowel syndrome, asthma, and allergies. Problems with other aspects of the female reproductive system must be excluded, including dysmenorrhea (pain during the menstrual period, rather than before it), endometriosis, perimenopause, and adverse effects produced by oral contraceptive pills.
The National Institute of Mental Health research definition compares the intensity of symptoms from cycle days 5 to 10 to the six-day interval before the onset of the menstrual period. To qualify as PMS, symptom intensity must increase at least 30% in the six days before menstruation. Additionally, this pattern must be documented for at least two consecutive cycles.
Many treatments have been tried in PMS. Reducing salt, caffeine, and stress along with increasing exercise is typically all that is recommended in those with mild symptoms. Calcium and vitamin D supplementation may be useful in some. Antiinflammatories such as naproxen may help with physical symptoms. In those with more significant symptoms birth control pills may be useful.
SSRIs like fluoxetine, sertraline can be used to treat severe PMS. Women with PMS may be able to take medication only on the days when symptoms are expected to occur. Although intermittent therapy might be more acceptable to some women, this might be less effective than continuous regimens. Side effect such as nausea and weakness are however relatively common.
Hormonal contraception is commonly used; common forms include the combined oral contraceptive pill and the contraceptive patch. This class of medication may cause PMS-related symptoms in some women, and may reduce physical symptoms in other women. They do not relieve emotional symptoms.
Gonadotropin-releasing hormone agonists can be useful in severe forms of PMS but have their own set of significant potential side effects.
PMS is generally a stable diagnosis, with susceptible women experiencing the same symptoms at the same intensity near the end of each cycle for years. Treatment for specific symptoms is usually effective.
Even without treatment, symptoms tend to decrease in perimenopausal women. However, women who experience PMS or PMDD are more likely to have significant symptoms associated with menopause, such as hot flashes.
Up to 80% women of child-bearing age report having some symptoms prior to menstruation. These symptoms qualify as PMS in 20 to 30% of women and in three to eight percent are severe.
PMS was originally seen as an imagined disease. Women who reported its symptoms were often told it was "all in their head". Woman’s reproductive organs were thought to have complete control over them. Women were warned not to divert needed energy away from the uterus and ovaries. This view of limited energy very quickly ran up against a reality in 19th century America that young girls worked extremely long and hard hours in factories; newspapers in the 19th century were peppered with remedies to help in the "tyrannous processes" of the menstrual cycle. In 1873 Edward Clarke published an influential book titled Sex in Education. Clarke came to a conclusion that female operatives suffer less than schoolgirls because they "work their brain less". This suggested that they have stronger bodies and a reproductive "apparatus more normally constructed". Feminists later took opposition to Clarke's argument that women should not leave the private sphere by showing how woman could function in the world outside the home in spite of their bodily functions.
The formal medical description of premenstrual syndrome (PMS) and the more severe, related diagnosis of premenstrual dysphoric disorder (PMDD) goes back at least 70 years to a paper presented at the New York Academy of Medicine by Robert T. Frank titled "Hormonal Causes of Premenstrual Tension". The specific term premenstrual syndrome appears to date from an article published in 1953 by Dalton and Green in the British Medical Journal. Since then, PMS has been a continuous presence in popular culture, occupying a place that is larger than the research attention accorded it as a medical diagnosis. It has been argued that women are partially responsible for the medicalization of PMS. By legitimizing this disorder, women have contributed to the social construction of PMS as an illness. It has also been suggested that the public debate over PMS and PMDD was impacted by organizations who had a stake in the outcome including feminists, the American Psychiatric Association, physicians and scientists. Until the 1950s, there was little research done surrounding PMS and it was not seen as a social problem. By the 1980s, however, viewing PMS in a social context had begun to take place.
Some supporters of PMS as a social construct believe PMDD and PMS to be unrelated issues: according to them, PMDD is a product of brain chemistry, and PMS is a product of a hypochondriatic culture. Most studies on PMS and PMDD rely solely on self-reporting. According to sociologist Carol Tavris, Western women are socially conditioned to expect PMS or to at least know of its existence, and they therefore report their symptoms accordingly. The anthropologist Emily Martin argues that PMS is a cultural phenomenon that continues to grow in a positive feedback loop, and thus is a social construction that contributes to learned helplessness or convenient excuse. Tavris says that PMS is blamed as an explanation for rage or sadness. The decision to call PMDD an illness has been criticized as inappropriate medicalization. In both cases, they are referring to the emotional aspects, not the normal physical symptoms that are subjectively present.
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