Okay, no personal experience with this one, but I have actually read of this happening. I can't remember where I read it now, other than it was a caring for your body type of book. I think the reason I remember what it said is that I had no idea this could happen, so it stuck with me. Anyway, what it said was that sometimes it is possible for the secretions that are normal in the area to dry and act a bit like glue, adhering the clitoral hood to the clitoris. The book recommended coating the area with A&D ointment (yup, diaper ointment) and massaging gently several times a day for a few days to loosen the adhesions, then washing gently with water. If this doesn't work, off to the doc you go.
Good luck!