Yellow Liquid During Menstrual Period: Causes and Concerns - Gastroenterology and Hepatology

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Passing gas accompanied by yellow liquid?


Doctor, I have a question.
I am currently on my menstrual period, but sometimes I experience what feels like passing gas.
However, when I go to the bathroom, I notice a yellow, foul-smelling, liquid discharge on my sanitary pad that resembles feces.
What could this be? I visited a gastroenterologist last week due to vomiting and diarrhea, but I felt better after taking the medication.
Now, I'm really unsure about this situation.

Hong Xiao Jie, 20~29 year old female. Ask Date: 2016/04/04

Dr. Lin Minghui reply Gastroenterology and Hepatology


If you have any concerns about vaginal discharge or mucus shedding from the intestines, please seek consultation at an outpatient clinic.
Wishing you good health.

Reply Date: 2016/04/04

More Info


The presence of yellow liquid during your menstrual period can be concerning, especially when accompanied by an unusual odor. It’s important to understand that menstrual fluid can vary in color and consistency due to several factors, including hormonal changes, the presence of cervical mucus, and even dietary influences.
Firstly, menstrual fluid typically consists of blood, vaginal secretions, and endometrial tissue. The color can range from bright red to dark brown, and sometimes it may appear yellowish. A yellowish tint can occur due to the mixing of menstrual blood with cervical mucus, which can be more pronounced during certain phases of your menstrual cycle. This is particularly true if you are experiencing ovulation or if your body is producing more cervical mucus than usual.

However, the presence of a foul odor and a liquid consistency that resembles diarrhea raises some concerns. This could indicate an infection, such as bacterial vaginosis or a sexually transmitted infection (STI). Infections can alter the normal flora of the vagina, leading to changes in discharge color and odor. Bacterial vaginosis, for instance, is characterized by a fishy odor and can produce a yellow or gray discharge. STIs like trichomoniasis can also cause yellow-green discharge with a strong odor.

Given your recent gastrointestinal issues, it’s also possible that your body is still recovering from an infection or that there is a connection between your gastrointestinal health and your menstrual symptoms. Sometimes, gastrointestinal infections can lead to changes in the vaginal flora, which may result in abnormal discharge.

It’s crucial to monitor your symptoms closely. If the yellow liquid continues, or if you experience additional symptoms such as itching, burning, or increased odor, it would be wise to consult a healthcare provider. They may recommend a pelvic exam and possibly tests to determine if there is an underlying infection that needs treatment.

In the meantime, maintaining good hygiene is essential. Change your sanitary products frequently, and consider using unscented products to avoid irritation. If you have any concerns about your menstrual health or if the symptoms worsen, do not hesitate to seek medical advice.
In summary, while some variation in menstrual fluid is normal, the combination of yellow color, liquid consistency, and odor suggests that further evaluation may be necessary to rule out infections or other underlying conditions. Your health is paramount, and addressing these symptoms with a healthcare professional will provide you with the best course of action.

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