Abnormal Vaginal Bleeding: Causes and Concerns - Obstetrics and Gynecology

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Intermenstrual bleeding


Hello doctor, my situation is quite complex.
I initially had a fever, and after taking antipyretics, I started to feel better after a day.
However, I then experienced issues with bowel movements, which led to skin irritation between the anus and vagina (at least that's what I believe, as there was no bleeding at that time), and I have a history of both internal and external hemorrhoids.
After that, I noticed different lumps near the vagina, and I experienced pain while urinating.
When I saw a doctor, he diagnosed me with folliculitis.
Currently, I am applying the ointment prescribed by the doctor and taking antibiotics to treat the folliculitis, while also using an ointment for anal fissures and hemorrhoids that I purchased at the pharmacy.
However, I am now experiencing vaginal bleeding, even though my period just started at the beginning of September, and I typically expect my next period in early October.
My menstrual cycle is usually quite regular.
Therefore, I would like to ask if this abnormal bleeding could be caused by the antibiotics I am taking? (I was diagnosed with a small uterine fibroid about a year or two ago).

Kiana, 30~39 year old female. Ask Date: 2021/09/19

Dr. Wu Xianghui reply Obstetrics and Gynecology


"Abnormal vaginal bleeding" has numerous causes, including lifestyle habits, stress, age, vaginal infections, benign gynecological conditions, and malignant tumors, among others.
Therefore, it is recommended that you return to a professional obstetrician-gynecologist for examination and evaluation.

Reply Date: 2021/09/19

More Info


Abnormal vaginal bleeding can be a source of significant concern for many women, and understanding its potential causes is crucial for effective management. Based on your description, it seems that you are experiencing a complex interplay of symptoms, including a recent fever, issues related to bowel movements, and the development of skin irritation between the anus and vagina, which you suspect may have led to your current bleeding.

Firstly, it's important to note that abnormal vaginal bleeding can arise from various factors, including hormonal imbalances, infections, structural abnormalities, and even external irritations. In your case, the recent development of skin irritation and the diagnosis of folliculitis (inflammation of hair follicles) may be contributing to your symptoms. Skin irritation in the genital area can lead to inflammation and, in some cases, minor bleeding, especially if there is friction or trauma involved.

The use of antibiotics for treating folliculitis is generally not associated with causing abnormal vaginal bleeding directly. However, antibiotics can disrupt the natural balance of bacteria in the vagina, potentially leading to yeast infections or bacterial vaginosis, both of which can cause abnormal discharge and bleeding. If you notice any changes in your vaginal discharge, such as increased itching, burning, or unusual odor, it would be wise to consult your healthcare provider for further evaluation.

Additionally, you mentioned a history of uterine fibroids. While small fibroids often do not cause symptoms, they can sometimes lead to abnormal bleeding, especially if they are located in a position that affects the uterine lining. It's essential to monitor your menstrual cycle and any irregularities closely. If the bleeding persists or worsens, or if you experience significant pain, it would be prudent to seek further evaluation from a gynecologist. They may recommend imaging studies, such as an ultrasound, to assess the status of the fibroids and rule out other potential causes of bleeding.

Moreover, hormonal fluctuations can also play a significant role in abnormal bleeding. Stress, changes in weight, and lifestyle factors can all influence hormonal levels, leading to irregular bleeding patterns. Given that your menstrual cycle is typically regular, any deviation from this pattern warrants attention.

In summary, while your current bleeding may not be directly caused by the antibiotics, it is essential to consider the broader context of your symptoms. The irritation from bowel movements, potential infections, and your history of fibroids all contribute to the complexity of your situation. I recommend maintaining open communication with your healthcare provider, reporting any new symptoms, and discussing the possibility of further diagnostic evaluations if the bleeding continues. Understanding the underlying cause of your abnormal bleeding is crucial for effective treatment and peace of mind.

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