What is the reason for brownish, blood-stained discharge a few days before menstruation?

Patient's question:

No

Doctor's answer:

There are many causes that can lead to irregular vaginal bleeding. Vaginal lesions and cervical lesions can both cause vaginal bleeding, but the most common cause is still uterine lesions. Since irregular vaginal bleeding can be caused by many factors, patients must seek medical attention for examination once this occurs. When necessary, tests such as cervical scraping, colposcopy, diagnostic dilation and curettage, and hysteroscopy should be performed to confirm the diagnosis and start treatment early.