Why do I get brown spotting before my period each month?

Brown spotting right before a period is usually old blood leaving the uterus slowly, which can look brown rather than bright red. Many people notice this as a normal start to their cycle, but when it happens every month (especially with worsening cramps, pelvic pain, pain with sex, heavy flow, or infertility), it can also suggest that something more than a simple timing issue is going on.

In our experience, recurrent pre-period spotting can overlap with conditions that affect bleeding patterns and pelvic inflammation, including endometriosis, adenomyosis, hormone and ovulation patterns, cervical or uterine lining issues, and other look-alike or coexisting conditions. The full pattern matters: when the spotting starts, how long it lasts, how your pain and bowel and bladder symptoms change around it, and whether you have mid-cycle flares or progressively heavier periods.

If this is a consistent monthly pattern for you, our team can help you map your symptoms and evaluate the broader picture with a careful history, exam, and, when appropriate, expertly interpreted ultrasound or MRI. From there, we can explain what the spotting likely represents in your case and which next steps make sense, including treatment pathways that fit your goals.