If your period blood is brown, it may be caused by several factors. Some possible causes include:
- Old blood: The blood may be taking longer to leave your body, which can cause it to turn brown.
- Hormonal fluctuations: Hormonal changes can cause the blood to be more or less oxygenated, which can affect its color.
- Certain medications: Some medications, such as birth control pills, can cause changes in the color of period blood.
- Pregnancy: Brown spotting can sometimes occur in early pregnancy.
- Perimenopause or menopause: As woman get closer to menopause, periods can become less regular and the blood can appear brown or dark.
It is generally considered normal to have some variation in the color of menstrual blood. However, if you have any concerns or if this is a new change for you, it is best to speak with a healthcare provider to ensure that there is no underlying issue.