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 ...

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Incomplete sealing of the urachus — a line of connectivity between a fetus and the umbilical cord — can cause a urachal cyst to develop. It can lead to abdominal pain and other symptoms and often ...

Ingrown hairs in the pubic area can form cysts, or sacs of fluid beneath the skin. A person may notice a lump, possibly with a hair visible beneath it. Cysts often go away without treatment, but some ...

Pilonidal sinus—also called a pilonidal cyst—is a skin infection that occurs in or around the crease of your buttocks. This condition happens when hair, skin cells, and dirt clog a hair follicle, ...