Endometriosis is linked to vulvodynia and other pain conditions, like vaginismus. Vulvodynia is vulvar pain that has lasted for at least 3 months without a clear cause. A 2020 study suggests that vulvodynia and endometriosis co-occur in around 11% of affected people. This doesn’t mean that one condition causes the other. However, the increased pain and sensitivity that comes with endometriosis may contribute to vulvar pain.