Medically reviewed by Robert Burakoff, MD Key Takeaways A urachal cyst is a sac of tissue and fluid between the bladder and the belly button, which can sometimes cause discomfort or symptoms if it ...

Thick, brown belly button discharge may happen if you haven't washed your belly button in a while. This discharge is likely caused by skin cells, sweat, dirt, fungi, and bacteria build-up and can be ...