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Abnormal Vaginal Bleeding
About this symptom
Many women experience abnormal vaginal bleeding or spotting between periods sometime in their lives. Vaginal bleeding is considered to be abnormal if it occurs:
- When you are not expecting your menstrual period.
- When your menstrual flow is lighter or heavier than what is normal for you.
- At a time in life when it is not expected, such as before age 10, when you are pregnant, or after menopause.
Causes of abnormal bleeding
Abnormal vaginal bleeding has many possible causes. By itself, it does not necessarily indicate a serious condition.
- Because bleeding can indicate a problem with
pregnancy, possible pregnancy should always be considered in a woman of
childbearing age.
- Spotting to minimal bleeding may be normal, but any bleeding during pregnancy needs to be evaluated by your doctor.
- Heavy vaginal bleeding or bleeding that occurs before 12 weeks may indicate a serious problem, including an ectopic pregnancy or miscarriage.
- Heavy vaginal bleeding or bleeding that occurs after 12 weeks also may indicate a serious problem, such as placenta previa.
- Ovulation can cause midcycle bleeding.
- Polycystic ovary syndrome (PCOS) is a hormone imbalance that interferes with normal ovulation which can cause abnormal bleeding.
- Medicines, such as birth control pills, sometimes cause abnormal vaginal bleeding. You may have minor bleeding between periods during the first few months if you have recently started using birth control pills. You also may have bleeding if you do not take your pills at a regular time each day. For more information, see the topic Birth Control.
- An intrauterine device (IUD) also may increase your chances of spotting or heavy periods. For more information on the IUD, see the topic Birth Control.
- Infection of the
pelvic organs
(vagina, cervix, uterus, fallopian tubes, or ovaries) may cause
vaginal bleeding, especially after intercourse or douching. Sexually
transmitted diseases (STDs) are often the cause of infections. For more
information, see the topic
Exposure to Sexually Transmitted Diseases. - Pelvic inflammatory disease (PID) causes inflammation or infection of the uterus, fallopian tubes, or ovaries which can cause abnormal bleeding.
Other, less common causes of abnormal vaginal bleeding that may be more serious include:
- Sexual abuse.
- An object in the vagina.
- Uterine fibroids, which are a common cause of heavy periods. For more information, see the topic Uterine Fibroids.
- Structural problems, such as urethral prolapse or polyps.
- Cancer of the cervix, uterus, ovaries, or vagina.
- Extreme emotional stress and excessive exercise. But excessive exercise more frequently causes an absence of menstruation (amenorrhea).
- Other diseases, such as hyperthyroidism or diabetes.
Heavy bleeding during the first few weeks after delivery (postpartum) or after an abortion may occur because the uterus has not contracted to the prepregnancy size or because fetal tissue remains in the uterus (retained products of conception).
If you are age 40 or older, abnormal vaginal bleeding may mean that you are entering perimenopause. In a woman who has not had a menstrual period for 12 months, vaginal bleeding is always abnormal and should be discussed with your doctor.
Treatment of abnormal vaginal bleeding depends on the cause of the bleeding.
Use the Check Your Symptoms section to decide if and when you should see a doctor.
© 1995-2011 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated. This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.
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