After menopause, circulating estrogen drops dramatically. Because the vagina, vulva, urethra, and bladder trigone all contain estrogen receptors, these tissues become thinner, drier, less elastic, and more fragile. The resulting cluster of symptoms is called genitourinary syndrome of menopause (GSM) — previously known as atrophic vaginitis.
GSM affects an estimated 50–70% of postmenopausal women. Unlike hot flashes, it does not improve on its own with time — it typically worsens. The good news: it responds very well to treatment.