Abnormal Bleeding: Is Your Birth Control to Blame? - Obstetrics and Gynecology

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Bleeding condition


During the last sexual intercourse, there was bleeding (bright red) but no pain or discomfort.
Afterwards, there was a small amount of bleeding when using the restroom (not hematuria), which was reddish and dark brown.
I am currently taking oral contraceptives, and this is my fourth month.
Could the bleeding be caused by the contraceptive pills?

Niming, 20~29 year old female. Ask Date: 2020/06/23

Dr. Lin Manying reply Obstetrics and Gynecology


Hello, Miss: Regarding your inquiry, there are two possible causes: one is bleeding caused by the contraceptive pill, and the other is an issue related to the cervix.
It is recommended that if you have not had a Pap smear in the past year, you should get one, or consult with your physician about whether you need to change your contraceptive method.
Hualien Hospital, Ministry of Health and Welfare, cares about your health.

Reply Date: 2020/06/23

More Info


Abnormal bleeding can be a concerning issue for many individuals, especially when it occurs unexpectedly during or after sexual intercourse. In your case, you mentioned experiencing bright red bleeding during intercourse, followed by some light bleeding that appears red and deep brown. You are currently taking birth control pills, which can indeed influence your menstrual cycle and bleeding patterns.

First, it is essential to understand that hormonal contraceptives, such as birth control pills, can cause various side effects, including changes in bleeding patterns. Some common effects include:
1. Breakthrough Bleeding: This is light bleeding or spotting that can occur between periods, especially during the first few months of starting a new birth control method. It is often due to hormonal fluctuations and usually resolves as your body adjusts to the medication.

2. Changes in Menstrual Cycle: Birth control pills can lead to lighter, shorter, or even missed periods. Some individuals may experience spotting instead of a full menstrual flow.

3. Hormonal Imbalance: If the dosage of hormones in the birth control pill is not suitable for your body, it can lead to irregular bleeding. This is particularly common if you have recently started the pill or changed brands.

Given that you are in your fourth month of taking the pill, it is possible that your body is still adjusting to the hormones. However, if the bleeding is persistent, heavy, or accompanied by other symptoms (such as pain or discomfort), it is crucial to consult your healthcare provider. They may want to rule out other potential causes of abnormal bleeding, such as:
- Cervical or Uterine Issues: Conditions like cervical polyps, fibroids, or infections can cause bleeding during or after intercourse.

- Infections: Sexually transmitted infections (STIs) or other infections can lead to abnormal bleeding.

- Pregnancy: Although you are on birth control, there is still a small chance of pregnancy, which can also cause bleeding.

In your specific situation, the bright red bleeding during intercourse could be attributed to several factors, including the use of birth control pills. However, it is essential to monitor the situation closely. If the bleeding continues or worsens, or if you experience any new symptoms, it is advisable to seek medical attention promptly.

In summary, while hormonal birth control can cause abnormal bleeding, it is essential to differentiate between normal side effects and potential underlying issues. Regular follow-ups with your healthcare provider can help ensure that any concerns are addressed and that you receive appropriate care tailored to your needs.

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