Why is my period dark brown at the beginning?

Why is my period dark brown at the beginning?

Menstruation is a natural process in a woman’s body that occurs every month. The color and texture of menstrual blood can vary from woman to woman and even from cycle to cycle. While some women experience bright red blood during their menstrual cycle, others may experience dark brown blood at the beginning of their period. Understanding the reasons behind brown menstrual blood can help women feel more confident and informed about their reproductive health.

What causes brown menstrual blood?

Brown menstrual blood at the beginning of a period is a common occurrence and is typically nothing to worry about. Some of the most common causes of brown menstrual blood include:

  • Menstrual blood that is slow to exit the body and has time to oxidize, giving it a brown color.
  • Old blood that was not completely expelled during the last cycle, which mixes with new blood to create a brownish discharge.
  • Changes in hormone levels that cause the uterus to shed its lining irregularly.
  • Fibroids, endometriosis, or polyps in the uterus or cervix can cause heavy and irregular bleeding, which may appear brownish in color.
  • Use of hormonal contraceptives, which can alter the color and texture of menstrual blood.

When should I worry about brown menstrual blood?

While brown menstrual blood is usually nothing to worry about, there are certain situations where women should talk to their doctor. These include:

  • Heavy bleeding that lasts longer than seven days or that requires changing pads or tampons every hour.
  • Painful periods that interfere with daily activities or that require medication to manage.
  • Irregular periods that are accompanied by other symptoms, such as weight gain, acne, or facial hair growth.
  • Bleeding or spotting between periods.
  • History of miscarriage or ectopic pregnancy.

What can I do to prevent brown menstrual blood?

While there is no surefire way to prevent brown menstrual blood, there are certain things women can do to promote regular and healthy periods. These include:

  • Maintaining a healthy weight and exercising regularly.
  • Eating a nutritious diet that is rich in fruits, vegetables, whole grains, and lean protein.
  • Getting enough rest and managing stress levels effectively.
  • Using birth control consistently and correctly to regulate periods and prevent unintended pregnancy.
  • Talking to a healthcare provider about underlying medical conditions or medications that may be affecting menstrual health.

What is the outlook for brown menstrual blood?

Brown menstrual blood is usually nothing to worry about and is simply a sign that the body is shedding its lining as it prepares for the next cycle. However, if women experience heavy or irregular bleeding, pain, or other symptoms, it is important to talk to a healthcare provider to rule out underlying medical conditions. By taking steps to promote menstrual health and seeking medical attention when needed, women can feel confident and empowered about their reproductive health.


  • Mayo Clinic. (2020). Menstrual cycle: What’s normal, what’s not. Mayo Clinic. https://www.mayoclinic.org/healthy-lifestyle/womens-health/in-depth/menstrual-cycle/art-20047186
  • Office on Women’s Health. (2019). Menstrual Cycle. U.S. Department of Health and Human Services. https://www.womenshealth.gov/menstrual-cycle
  • Women’s Health Queensland Wide Inc. (2021). Menstruation: What You Need to Know. Better Health Channel. https://www.betterhealth.vic.gov.au/health/healthyliving/menstruation-what-you-need-to-know