so what should I do, just try not to do anything that causes the cyst to rupture, like have sex?
The most common cysts are fluid filled. When cysts break down or rupture, the fluid escapes and must be reabsorbed by the body. This process is painful, I guess because the body reacts to the fluid like it doesn't belong there. The cyst is probably placing some pressure on the urinary tract and bowels. All these parts are very close together and it does not take much to cause discomfort to other body parts when a cyst develops and presses against something.