Period blood can change in color over the course of your cycle, and can range from bright red, to … See more

The beginning or end of your period
The flow of blood is slower at the start and end of your period, meaning it takes longer to exit your body. The longer it sits in your body, the … See more

You might notice dark red period blood when you first get up in the morning or after lying down for a while. The deep red shade may be thanks to gravity keeping the blood sitting in th… See more

Infection
Some sexually transmitted infections (STIs), like chlamydia and gonorrhea, can cause bleeding between periods. STIs can also cause: … See more

Lochia
From day four onward, lochia — or postpartum bleeding — may be pinkish or brownish in color.
Low estrogen… See more