Bleeding between periods can be unnerving, although most people who menstruate experience this at some point in their lives.
"Intermenstrual bleeding" broadly refers to bleeding from the vagina that occurs between a person's expected menstrual periods, and it includes "spotting," which refers to relatively light blood loss. Intermenstrual bleeding is different from having irregular periods, where the length of the menstrual cycle fluctuates such that one's period doesn't come at regular intervals.
