Post-Menstrual Brown Discharge: Possible Causes and Warning Signs

Brown discharge after menses can be normal (oxidized old blood) or indicate pathology:

Potential Causes

• Infections (bacterial vaginosis, candidiasis, trichomoniasis)
• Hormonal fluctuations (OCPs, perimenopause, thyroid dysfunction)
• Medication effects (anticoagulants, hormonal therapy)
• Structural lesions (polyps, fibroids, cervical ectropion)
• Malignancy (cervical, endometrial, ovarian) – rare but must be excluded

Red Flags for Infection

• Foul odor
• Pruritus, burning
• Dyspareunia
• Intermenstrual bleeding
• Fever, pelvic pain

Any concerning discharge warrants gynecologic evaluation with speculum exam, pH testing, microscopy, and/or culture.