Why is my period blood black, and when should black discharge be medically assessed in Europe?

Black period blood explained: oxidised blood, slow menstrual flow, hormonal changes, infection, and red flag symptoms.

In this episode, we outline common causes of dark or black menstrual discharge and how doctors distinguish normal variation from underlying conditions under EU medical guidance.

You’ll learn:

• Why older, oxidised blood appears dark brown or black

• How slow flow at the beginning or end of a period changes colour

• The role of hormonal contraception in altering bleeding patterns

• When retained blood or delayed shedding may occur

• Signs of infection, including foul odour or pelvic pain

• The difference between normal discharge and abnormal bleeding

• When pregnancy testing is appropriate

• Red flag symptoms such as severe abdominal pain, fever, heavy bleeding, or unusual discharge

We explain how doctors assess menstrual cycle timing, contraception use, pregnancy risk, pelvic pain, vaginal symptoms, and recent sexual history during an online consultation in the EU. Most cases of black period blood are benign, but persistent or symptomatic changes require evaluation.

This episode reflects the clinical standards used by Mobi Doctor, where women’s health consultations are reviewed by a registered physician in line with EU medical guidance.

Read the full guide and transcript here:

https://www.mobidoctor.eu/blog/why-is-my-period-blood-black