How big is it and how long ago did it hatch? (picture would help) It could just be the remnants of the yolk sac being absorbed. I just hatched out an albino that had a small pea-sized bulge extruding. I gently pushed it inside and let her rest on a moist paper towel for a couple of days. She's good as new.

Hopefully it's the same situation that you're going through.