Menstruation is a natural phenomenon for women during their reproductive years. Our aim was to describe womens experiences of menstruation across the lifespan. Qualitative interviews with a narrative approach were conducted with 12 women between 18 and 48 years of age in Sweden. Using thematic analysis, we found menstruation to be a complex phenomenon that binds women together. It is perceived as an intimate and private matter, which makes women want to conceal the occurrence of menstrual bleeding. Over time, menstruation becomes a natural part of womens lives and gender identity. Health professionals play a central role supporting women to deal with menstruation.