Umbilical dermatitis is a common condition, with infection common in adults. It is usually associated with inadequate hygiene and deepening of umbilical cord.
You might notice white, yellow, brown, or bloody discharge seeping out of your belly button. Causes of belly button discharge include infections, surgery, and cysts. Candidiasis in your belly button causes a red, itchy rash on your navel and may also cause a thick, white discharge.
Umbilical discharge in adult is rare, can be quite alarming and could be congenital or acquired, but is usually caused by a foreign material.