What does it mean if menstrual blood is somewhat dark green?

In general, menstrual blood appearing dark green may be caused by various factors such as a specific phase of the menstrual cycle, mixed secretions, cervical erosion, vaginitis, or endometriosis. It is recommended to seek medical attention promptly, identify the underlying cause, and receive appropriate treatment under the guidance of a qualified physician. Specific explanations are as follows:

1. Specific Phase of the Menstrual Cycle

During the early or late stages of menstruation, blood may remain in the body for a longer period, leading to reduced oxygen levels. This can cause the blood to darken and appear dark green. No special treatment is required, as this is a physiological phenomenon; maintaining good personal hygiene is sufficient.

2. Mixed Secretions

During menstruation, cervical mucus and vaginal secretions may mix with blood, potentially altering its color to dark green. Regularly changing sanitary pads or using tampons can help reduce the risk of bacterial growth.

3. Cervical Erosion

Cervical erosion is usually associated with infections or hormonal imbalances. Shedding of surface cervical cells causes blood to stagnate and oxidize at the eroded site, turning it dark green. This condition may be accompanied by vaginal bleeding and dysmenorrhea. Medications such as tinidazole tablets, azithromycin tablets, or cefixime tablets may be used under a doctor’s supervision.

4. Vaginitis

Vaginitis results from excessive bacterial growth in the perineal area, causing imbalance in the vaginal environment, which can alter the color and consistency of menstrual blood, making it appear dark green. Symptoms may also include itching and pain. Medications such as ketoconazole cream, metronidazole tablets, or fluconazole capsules may be prescribed to relieve symptoms.

5. Endometriosis

Endometriosis is primarily caused by genetic factors or infections. Ectopic endometrial tissue grows outside the uterus and bleeds, with blood accumulating and oxidizing within the lesions, resulting in abnormal menstrual blood color—often dark green. Symptoms may include infertility and dysmenorrhea. Treatment should be guided by a specialist using medications such as ibuprofen sustained-release capsules, acetaminophen tablets, or mifepristone tablets.

In daily life, it is important to develop healthy habits, maintain an optimistic mindset, and engage in regular physical activity.