Possible Causes of Yellow, Foul-Smelling Discharge and Back Pain - Obstetrics and Gynecology

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Yellow discharge with a foul odor and a sour smell, along with lower back pain?


Menstruation occurred from November 19 to November 27.
On November 27, there was unprotected sexual intercourse without ejaculation.
After that, there was light bleeding for four consecutive days, with a light brown color.
By December 2, there was yellow discharge with a foul, sour odor, and there was also lower back pain.
What could be the possible symptoms in this case?

Lin, 10~19 year old female. Ask Date: 2022/12/11

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, I have previously responded to your inquiry.
Wishing you good health.

Reply Date: 2022/12/11

More Info


The symptoms you are experiencing, including yellow, foul-smelling discharge, and back pain, can be indicative of several potential medical conditions. Given the timeline you provided, it is essential to consider various factors that could contribute to these symptoms.

1. Infection: The presence of yellow discharge with a foul odor is often associated with infections. One common cause is bacterial vaginosis (BV), which occurs when there is an imbalance in the normal bacteria found in the vagina. BV can lead to a fishy odor and yellowish discharge. Another possibility is a sexually transmitted infection (STI) such as gonorrhea or chlamydia, which can also present with abnormal discharge and discomfort.

2. Cervical or Vaginal Infections: Conditions such as cervicitis (inflammation of the cervix) can cause similar symptoms. This inflammation can be due to infections, including STIs or other pathogens. The foul smell and color of the discharge can help differentiate the type of infection.

3. Pelvic Inflammatory Disease (PID): If the infection spreads to the reproductive organs, it can lead to PID, which may cause lower abdominal pain, back pain, and abnormal discharge. PID is a serious condition that requires prompt medical attention.

4. Hormonal Changes: The timing of your symptoms in relation to your menstrual cycle may also suggest that hormonal fluctuations could be playing a role. However, the presence of foul-smelling discharge is more suggestive of an infection rather than just hormonal changes.

5. Other Conditions: Conditions such as endometriosis or fibroids can cause pelvic pain and may lead to abnormal bleeding or discharge. However, these conditions typically do not cause foul-smelling discharge.

Given the potential seriousness of these symptoms, it is crucial to seek medical attention. A healthcare provider will likely perform a pelvic examination, take a detailed history, and possibly conduct laboratory tests, including a swab of the discharge, to identify the underlying cause.
In the meantime, here are some general recommendations:
- Avoid Irritants: Refrain from using scented soaps, douches, or other vaginal products that can disrupt the natural flora of the vagina.

- Practice Safe Sex: Until you have a clear diagnosis, consider using protection during sexual activity to prevent potential transmission of infections.

- Monitor Symptoms: Keep track of any changes in your symptoms, including the amount and color of discharge, any additional pain, or fever, and report these to your healthcare provider.

In conclusion, the combination of yellow, foul-smelling discharge and back pain warrants a thorough evaluation by a healthcare professional. Early diagnosis and treatment are essential to prevent complications and ensure your reproductive health.

Similar Q&A

Possible Causes of Foul-Smelling Yellow Discharge and Back Pain

Menstruation occurred from November 19 to November 27. On November 27, there was unprotected sexual intercourse without ejaculation. Following that, there was light bleeding for four consecutive days, with a light brown color. By December 2, there was yellow discharge with a stro...


Dr. Cao Guotao reply Obstetrics and Gynecology
Hello, it could be inflammation. I recommend seeing a gynecologist. Wishing you good health.

[Read More] Possible Causes of Foul-Smelling Yellow Discharge and Back Pain


Possible Causes of Foul-Smelling Yellow Discharge and Back Pain

Menstruation occurred from November 19 to November 27. On November 27, there was unprotected sexual intercourse without ejaculation. Following that, there was light bleeding for four consecutive days, with a light brown color. By December 2, there was yellow discharge with a foul...


Dr. Cao Guotao reply Obstetrics and Gynecology
Hello, it could be inflammation. I recommend seeing a gynecologist. Wishing you good health.

[Read More] Possible Causes of Foul-Smelling Yellow Discharge and Back Pain


Possible Causes of Foul-Smelling Yellow Discharge and Back Pain

Menstruation occurred from November 19 to November 27. On November 27, there was unprotected sexual intercourse without ejaculation. Following that, there was light bleeding for four consecutive days, with a faint brown color. By December 2, yellow discharge appeared, which had a...


Dr. Cao Guotao reply Obstetrics and Gynecology
Hello, it could be inflammation. I recommend seeing a gynecologist. Wishing you good health.

[Read More] Possible Causes of Foul-Smelling Yellow Discharge and Back Pain


Possible Causes of Yellow, Foul-Smelling Discharge and Back Pain

Menstruation occurred from November 19 to November 27. On November 27, there was unprotected sexual intercourse without ejaculation. Following that, there was light bleeding for four consecutive days, with a faint brown color. By December 2, there was yellow discharge with a stro...


Dr. Cao Guotao reply Obstetrics and Gynecology
Hello, it could be inflammation. It is recommended to see a gynecologist for an examination. Wishing you good health.

[Read More] Possible Causes of Yellow, Foul-Smelling Discharge and Back Pain


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