It seems like you may have a fissure that is opening and closing in the area between the anus and the vagina. This could possibly be causing some discomfort or pain. To address this issue, you may want to consider applying a zinc cream twice a day to help keep the area hydrated and promote healing. Additionally, if you have noticed a skin tag protruding from the anus, this could be a sign of hemorrhoids. Using the same zinc cream could help reduce inflammation and discomfort. If the issue persists, it might be worth trying a specific hemorrhoid cream for a week. If you have any other concerns or questions, don't hesitate to seek further advice from a healthcare professional.