Ob-Gyn questions? Ask a gynecologist online.
Hi and welcome.
It is normal if you pass stool while asleep it can spread around and can reach up to vaginal area. I would suggest you to wash the area thoroughly and nothing much to worry about it would not cause any problem. Take lots of fluids and healthy fiber diet to avoid loose bowels.
Let me know if you have further questions.
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Wish you good health.