What causes the menstrual blood to appear dark brown in the later stages of menstruation?

Nov 13, 2024 Source: Cainiu Health
Dr. Zhang Lu
Introduction
Long-term late-night stays, irregular作息 (作息 should be translated as "work-rest patterns" or "daily routines"), and other unhealthy lifestyle habits may cause endocrine disorders, affecting the normal shedding of the endometrium and menstrual blood discharge, leading to prolonged retention of menstrual blood within the uterine cavity and subsequently resulting in dark brown menstrual blood. It is recommended to adjust your work-rest patterns, maintain regular and healthy lifestyle habits, and avoid staying up late. Additionally, maintain a positive emotional state and avoid excessive stress.

Generally, dark brown menstrual blood in the later stage of menstruation may be caused by irregular work and rest schedules, endometrial shedding, vaginitis, endometritis, cervicitis, and other factors. It is recommended to seek medical advice promptly and follow medical instructions for treatment. The specific details are as follows:

1. Irregular作息 (zuoxi, routine): Long-term熬夜 (熬夜, staying up late), and irregular作息 habits due to不良 lifestyle habits may lead to endocrine disorders, affecting the normal shedding of the endometrium and menstrual blood discharge, causing menstrual blood to remain in the uterine cavity for a prolonged period, resulting in dark brown menstrual blood. It is important to adjust your作息, maintain a regular lifestyle, and avoid熬夜. Maintain a good emotional state and avoid excessive stress.

2. Endometrial shedding: Menstruation is a physiological phenomenon involving cyclical shedding of the endometrium accompanied by bleeding. In the later stage of menstruation, as the endometrium gradually sheds, the amount of bleeding decreases, and the menstrual blood remains in the uterine cavity for an extended period, causing oxidation of iron elements in the blood, which turns the menstrual blood dark brown. No special treatment is required. It is recommended to maintain local hygiene, change underwear frequently, and avoid infections.

3. Vaginitis: Vaginitis is vaginal inflammation caused by various pathogens, which can lead to vaginal mucosal congestion, edema, and increased secretions. In the later stage of menstruation, inflammatory secretions in the vagina may mix with small amounts of menstrual blood, appearing dark brown, and may be accompanied by vaginal itching. Under a doctor's guidance, medications such as metronidazole suppositories, Baofukang suppositories, or clotrimazole vaginal tablets may be used, which have antibacterial and blood-activating effects.

4. Endometritis: Endometritis is an inflammatory condition of the endometrium that can be caused by pathogen infection. The inflammation can cause endometrial congestion and necrotic shedding. In the later stage of menstruation, the necrotic, shed endometrium mixed with small amounts of menstrual blood may appear dark brown and may be accompanied by lower abdominal pain. Under a doctor's guidance, medications such as metronidazole tablets, clindamycin hydrochloride capsules, or moxifloxacin hydrochloride tablets may be used for their antibacterial properties.

5. Cervicitis: Cervicitis is an inflammatory condition of the cervix, which may be caused by pathogen infection, physical or chemical irritation, and other factors. The inflammation can cause cervical mucosal congestion and erosion. In the later stage of menstruation, secretions from the cervical mucosa mixed with small amounts of menstrual blood may appear dark brown and may be accompanied by pain during intercourse. Follow medical advice to use antibiotics such as azithromycin tablets, clarithromycin dispersible tablets, or enteric-coated erythromycin capsules for anti-infective treatment.

In daily life, it is necessary to adjust your diet, avoiding excessive consumption of cold, spicy foods such as ice cream, chili peppers, garlic, etc., and focusing on warm-natured foods.