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A cyst is a sac-like pocket of membranous tissue that contains fluid, air, or other substances. Cysts can grow almost anywhere in your body or under your skin. There are many different types of cysts. Most cysts are benign, or noncancerous. Whether a cyst needs treatment depends on a number of factors, including: the type of cyst, the location of the cyst, if the cyst is causing pain or discomfort, whether the cyst is infected.
A small amount of steroid is injected into the cyst to decrease inflammation.
Excision is usually performed on cysts that are intact (non-ruptured). After numbing the area with a small amount of lidocaine, a small incision is made into the skin. The cyst is gently extracted from beneath the skin. Typically, the opening is then sewn back together using sutures (stitches).
I&D is usually performed on a cyst that has ruptured. The area is numbed with a small amount of lidocaine, then a small incision is made in the skin. Using pressure, any purulent material is extracted from the ruptured cyst. The provider will then try to remove any pieces of the sac that remain in order to help prevent the cyst from re-forming.