Early Period Changes: Dark Red Bleeding and Spotting – Possible Causes

Menstrual irregularities (early onset, dark blood, spotting) have multiple potential causes:

Common Factors

• Hormonal fluctuation – anovulatory cycles, perimenopause, PCOS, thyroid dysfunction.
• Stress – cortisol disrupts HPO axis.
• Medication changes – starting/stopping OCPs, IUDs, anticoagulants.
• Pregnancy‑related – implantation bleeding, early loss, ectopic.
• Structural – polyps, fibroids, adenomyosis.
• Infection/Inflammation – cervicitis, endometritis.
• Coagulopathy – von Willebrand, platelet disorders.

When to Seek Evaluation

• Bleeding >7 days or soaking >1 pad/hr.
• Severe pain, fever, dizziness.
• Positive pregnancy test with bleeding.
• Postmenopausal bleeding.

Track cycles (apps/calendar) and share data with your clinician for accurate diagnosis.