MedicineNet.com

About Us|Privacy Policy|Site Map
February 10, 2012

Menstrual Cramps (cont.)

Medical Author:
Medical Editor:

Can menstrual cramps be measured?

Yes. Menstrual cramps can be scientifically demonstrated by measuring the pressure within the uterus and the number and frequency of uterine contractions. During a normal menstrual period, the average woman has contractions of a low pressure (50-80 mm Hg), which last 15-30 seconds at a frequency of 1-4 contractions every 10 minutes. When a woman has menstrual cramps, her contractions are of a higher pressure (they may exceed 400 mm Hg), last longer than 90 seconds, and often occur less than 15 seconds apart.

What other factors influence menstrual cramps?

  • As mentioned above, an unusually narrow cervical canal tends to increase menstrual cramps.
  • Another anatomical factor thought to contribute to menstrual cramps is a backwards tilting of the uterus (a retroverted uterus).
  • Lack of exercise is now recognized to contribute to painful menstrual cramps.
  • It has long been thought that psychological factors also play a role. For example, it is widely accepted that emotional stress can increase the discomfort of menstrual cramps.

What are the symptoms of menstrual cramps?

Menstrual cramps are pains that begin in the lower abdomen and pelvis. The discomfort can extend to the lower back or legs. The cramps can be a quite painful or simply a dull ache. They can be periodic or continual.

Menstrual cramps usually start shortly before the menstrual period, peak within 24 hours after the onset of the bleeding, and subside again after a day or two.

Menstrual cramps may be accompanied by a headache and/or nausea, which can lead, although infrequently, to the point of vomiting. Menstrual cramps can also be accompanied by either constipation or diarrhea because the prostaglandins which cause smooth muscles to contract are found in both the uterus and intestinal tract. Some women experience an urge to urinate more frequently.


Patient Discussions

Viewers share their comments

Menstrual Cramps - Experiences Question: How often do you experience menstrual cramps?
Menstrual Cramps - Effective Treatments Question: What kinds of treatments have been effective for your menstrual cramps?

MedicineNet Doctors

Suggested Reading on Menstrual Cramps by Our Doctors

  • Related Diseases & Conditions

    • Endometriosis
      • Endometriosis is the growth of cells similar to those that form the inside of the uterus, but in a location outside of the uterus. Endometriosis implants are most commonly found on the ovaries, the Fallopian tubes, outer surfaces of the uterus or intestines, and on the surface lining of the pelvic cavity. They can also be found in the vagina, cervix, and bladder. Treatment of endometriosis can be with medication or surgery.
    • Vaginal Bleeding
      • Normal vaginal bleeding (menorrhea) occurs through the process of menstruation. Abnormal vaginal bleeding in women who are ovulating regularly most commonly involves excessive, frequent, irregular, or decreased bleeding. Causes of abnormal may arise from a variety of conditions.
    • Premenstrual Syndrome (PMS)
      • Premenstrual syndrome (PMS) is a combination of physical and emotional disturbances that occur after a woman ovulates and ends with menstruation. Common PMS symptoms include depression, irritability, crying, oversensitivity, and mood swings. For some women PMS symptoms can be controlled with medications and lifestyle changes such as exercise, nutrition, and a family and friend support system.
    • Chronic Pain
      • Chronic pain is pain (an unpleasant sense of discomfort) that persists or progresses over a long period of time. In contrast to acute pain that arises suddenly in response to a specific injury and is usually treatable, chronic pain persists over time and is often resistant to medical treatments.
    • Premenstrual Dysphoric Disorder (PMDD)
      • Premenstrual dysphoric disorder (PMDD) is considered to be a severe form of premenstrual syndrome (PMS). PMDD has also been referred to as late luteal phase dysphoric disorder. The cause of PMDD is unknown. Some of the common symptoms of PMDD (not an inclusive list) include: mood swings, bloating, fatigue, headache, irritability, headache, breast tenderness, acne, hot flashes and more. Treatment for PMDD is with medication to treat the symptoms of PMDD.
    • Menstruation
      • Menstruation (menstrual cycle) is also referred to as a "period." When a woman menstruates, the lining of the uterus is shed. This shedding of the uterine linking is the menstrual blood flow. The average menstrual cycle is 28 days. There can be problems with a woman's period, including heavy bleeding, pain, or skipped periods. Causes of these problems may be amenorrhea (lack fo a period), menstrual cramps (dysmenorrhea), or abnormal vaginal or uterine bleeding. There are a variety of situations in which a girl or woman should see a doctor about her menstrual cycle.
    • Menstrual Cramps and Premenstrual Syndrome (PMS) Medication Guide
      • Menstrual cramps and premenstrual syndrome (PMS) symptoms include abdominal cramping, bloating, a feeling of fullness, abdominal pain, mood swings, anxiety and more. Treatment for menstrual cramps and premenstrual syndrome (PMS) symptoms include regular sleep, exercise, smoking cessation, diet changes, and OTC or prescription medication depending on the severity of the condition.
    • Women's Health
      • Women's health is an important topic area to guide a woman through the stages of her life, as well as knowing the conditions and diseases that may occur. Educating yourself so that the transitions into different phases of life is key to a healthy, happy, and productive life.
    • Sexual Health
      • Sexual health information including birth control, impotence, herpes, sexually transmitted diseases, staying healthy, women's sexual health concerns, and men's sexual health concerns. Learn about the most common sexual conditions affecting men and women.
    • Teens
      • Teenagers recognize that they are developmentally between child and adult. Teen health prevention includes maintaining a healthy diet, exercising regularly, preventing injuries and screening annually for potential health conditions that could adversely affect teenage health.
    • Reproductive Health
      • Reproductive health encompasses the beginning of menstruation for women, choosing the right birth control method for you and your partner, preventing contracting sexually transmitted diseases (STDs), and for women, ending with the menopausal transition.
  • Medications

  • Procedures & Tests

  • Pictures, Images & Illustrations

  • Doctor's & Expert's Views

  • Health News

  • Health Features

Women's Health

Find out what women really need.



Symptom Checker: Your Guide to Symptoms & Signs: Pinpoint Your Pain





Use Pill Finder Find it Now

Pill Identifier on RxList

  • quick,
    easy,
    pill identification

Find a Local Pharmacy

  • including
    24 hour
    pharmacies