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What Are the Causes of Postmenopausal Spotting?

by
author image Kate Killoran
Katherine Killoran is a board certified OB/GYN practicing in Rockport, Maine. She graduated from Boston University School of Medicine in 1999 but really learned how to be healthy and well from her own breast cancer diagnosis. She blogs about healthy lifestyle habits on her website www.drkilloran.com.
What Are the Causes of Postmenopausal Spotting?
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Spotting or bleeding after menopause can be surprising and concerning, especially if your last period was many years ago. The most common causes of spotting after menopause include thinning of the reproductive tract tissues and hormone therapy. In some cases, spotting can signal cancer in the lining of the uterus or cervical cancer. Other possible causes of spotting include fibroids and small growths in the uterus or cervix, known as polyps. Any spotting after menopause should not be ignored, so see your doctor right away if you have this symptom.

Most Common Cause

What Are the Causes of Postmenopausal Spotting?
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A lack of estrogen is the most common cause of postmenopausal spotting in women not taking hormone therapy. Estrogen production drops to a low level after menopause, causing the tissues of both the vagina and uterus can become dry, thin and fragile. This is known as atrophy, which can cause bleeding. The bleeding usually comes from the lining of the uterus, known as the endometrium. In some cases, however, severe dryness causes small cracks and tears in the vagina that can also bleed.

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Hormone Therapy

What Are the Causes of Postmenopausal Spotting?
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Hormone replacement therapy, taken to reduce menopausal symptoms such as hot flashes and night sweats, can cause spotting or bleeding. Hormone therapy can stimulate the lining of the uterus and cause shedding and bleeding similar to a menstrual cycle. Tamoxifen (Soltamox, Nolvadex) is a specific type of hormone therapy taken to reduce the risk of breast cancer recurrence. This medication stimulates the lining of the uterus in some women, causing spotting or bleeding.

Uterine Cancer

What Are the Causes of Postmenopausal Spotting?
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Endometrial cancer, or cancer of the uterine lining, is the most common gynecologic cancer in the United States. This type of cancer is the reason that between 1 percent and 14 percent of women have bleeding after menopause, according to a review published in the February 2012 "Journal of Ultrasound in Medicine." Abnormal thickening of the uterine lining can also cause bleeding or spotting. This thickening is not cancerous but may progress to endometrial cancer over time if left untreated.

Less Common Causes

What Are the Causes of Postmenopausal Spotting?
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Uterine fibroids or polyps may also contribute to spotting. Polyps are abnormal growths inside the uterus or on the cervix, the opening of the uterus. Uterine fibroids are noncancerous uterine tumors that can contribute to heavy, painful periods before menopause and spotting or bleeding after menopause. Another possible cause of spotting after menopause is cervical cancer, which is less common than endometrial cancer. Other less common causes of spotting can include cervical or vaginal infections as well as injuries.

Seek Medical Attention

What Are the Causes of Postmenopausal Spotting?
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Any woman who hasn't had a period for at least 1 year is considered to be in menopause. When in menopause, spotting or bleeding is abnormal and should be evaluated by a doctor.

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