Cysts are most commonly caused by blockage in a duct, which can be due to trauma, infection, or even an inherited tendency. The type of cyst depends on where it forms – some cysts can be internal (such as in a breast, the ovaries, or the kidneys) while others are external and form in visible locations on the body.

Can a cyst go away on its own?

Benign cysts and pseudocysts usually don't cause long-term problems. Sometimes they even go away on their own. Cysts can refill after being drained. If you have a cyst that continues to refill, you may want to consider having it surgically removed.

How long do cysts last?

A cyst will not heal until it is lanced and drained or surgically excised. Without treatment, cysts will eventually rupture and partially drain. It may take months (or years) for these to progress. Once they rupture, the painful sebaceous cyst will likely return if the pocket lining is not removed entirely.