Prolonged Menstrual Bleeding and Its Causes - Obstetrics and Gynecology

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Prolonged menstruation?


Hello, doctor.
My original menstrual cycle lasted five days.
This time, after my period started on April 10, it lasted for ten days, with very light flow each day.
The first three days were dark in color, and the following days turned to a normal red.
After having no bleeding on April 14, I had sexual intercourse, and since then, I've had a small amount of brownish blood every day.
On April 19, I visited a gynecologist, who mentioned that I have a slight case of polycystic ovary syndrome (PCOS) but that it shouldn't have a significant impact.
The doctor prescribed medication to help with uterine contractions and bleeding, but I noticed that after taking the medication, whenever I lie down and then try to stand up, my inner thighs feel numb and weak.
Is this normal? Also, could the ongoing bleeding be related to the sexual intercourse? The doctor only performed an ultrasound and said that my endometrium looks normal, so I would like to know if the persistent bleeding could simply be due to PCOS.
Thank you!

Qing Tian, 10~19 year old female. Ask Date: 2022/04/21

Dr. Chen Zhiyu reply Obstetrics and Gynecology


If the condition does not improve with medication, or if new symptoms arise, it is recommended to return for a follow-up consultation with the original treating physician to discuss whether medication adjustments or further examinations are necessary.
Thank you.

Reply Date: 2022/04/21

More Info


Prolonged menstrual bleeding, also known as menorrhagia, can be a concerning issue for many women. It is defined as menstrual bleeding that lasts longer than seven days or is excessively heavy. In your case, experiencing a menstrual cycle that lasted ten days with varying blood colors can be indicative of several underlying causes, including hormonal imbalances, structural abnormalities, or medical conditions such as polycystic ovary syndrome (PCOS).

PCOS is a common endocrine disorder that affects women of reproductive age. It is characterized by irregular menstrual cycles, excess androgen levels, and polycystic ovaries. Women with PCOS often experience prolonged or irregular bleeding due to hormonal imbalances that affect the normal ovulatory cycle. The fact that your doctor noted you have a "little bit" of PCOS suggests that it could be a contributing factor to your prolonged bleeding.

The color of menstrual blood can also provide insights into its nature. Dark or brown blood typically indicates older blood that has taken longer to exit the uterus, while bright red blood is fresher. The transition from dark to normal red blood during your cycle may suggest that your body is shedding the uterine lining, but the prolonged duration of bleeding is still concerning.

Regarding your experience of light bleeding after sexual intercourse, this can sometimes occur due to various reasons, including cervical irritation or minor trauma during intercourse, especially if there is a lack of lubrication. However, if the bleeding persists or is accompanied by pain, it is essential to consult your healthcare provider for further evaluation.
The medication prescribed to you for controlling bleeding may have side effects, including the sensations of numbness or weakness in your thighs when standing up. These symptoms could be related to the medication's effects on your blood pressure or circulation. It is crucial to communicate these side effects to your doctor, as they may need to adjust your treatment plan or explore alternative medications.

In summary, while your prolonged bleeding may be linked to your diagnosis of PCOS, it is essential to consider other potential causes, including hormonal imbalances or structural issues within the uterus. Continuous monitoring and communication with your healthcare provider are vital. If the bleeding persists, worsens, or if you experience significant discomfort, further diagnostic tests such as a hysteroscopy or endometrial biopsy may be warranted to rule out other conditions.

In addition to medical treatment, lifestyle modifications can also play a role in managing PCOS and menstrual irregularities. Maintaining a healthy diet, engaging in regular physical activity, and managing stress can help regulate hormonal levels and improve overall reproductive health. Always consult your healthcare provider before making any significant changes to your treatment or lifestyle.

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