What would cause my belly button to leak a clear fluid?

?infection: Some infections of the skin structures around the belly button may get irritated and cause a leaking of fluid. This is more common in people who get piercings of course. Have it checked as leaking there needs an eval. Good luck.

Debris built up: Belly buttons come in all sizes and shapes. Old skin cells are being shed all the time and this material can build up in the umbilicus (belly button). Sometimes this debris can become infected and can drain some liquid material or pus. You may want to gently clean out area with peroxide on a q-tip. If it is a persistent problem, see your pcp, or a dermatologist.