Women commonly experience thinning eyebrows as they age, dermatologist Judith Hellman told Self. It's often the result of "too much tweezing or waxing earlier in life," she continued. "The trauma inflicted on hair follicles during waxing, tweezing, and threading can lead to permanent follicular damage," Sanusi Umar, board-certified dermatologist and founder of Dr. U Hair and Skin Clinic in Los Angeles, Calif., further revealed to the publication. "Women who grew up in the height of the '90s overplucked, pencil-thin brow trend have begun to notice the difficulty in growing thicker eyebrows after years of this habit."
Although those skinny brows may have made us look youthful and trendy back then, sporting sparse brows decades later will only make you look older. But, even if you didn't succumb to the style back then, it's possible that you will still experience thinning brows during menopause. "Abrupt hormone changes can cause sudden hair loss (telogen effluvium)," Nanette Santoro, an obstetrician-gynecologist and professor of reproductive endocrinology at the University of Colorado, explained.
All hope for your brows is not lost, though. Santoro explained that the hair usually "recovers over about six months' time."