In Hindu tradition, women usually pierce the left side of the nose. This has ties to Ayurveda. Ayurvedic medicine is a holistic system that dates back thousands of years, connecting the mind and body. There are claims that piercing the left side can alleviate the pain of menstruation and/or childbirth.
Also to know is, what does it mean to get your nose pierced on the right side?
Ayurvedic aspects behind nose piercing side
It is believed that boys pierce there right nostril and if guy pierces there left nostril then he is a gay and simultaneously if a girl pierces her right nostril then it is assumed that she is lesbian.