2. Cysts

A cyst is a sac that forms in the body, under the skin. They can be filled with fluid, air, or other material. Cysts are fairly common and are typically benign. They form for a variety of reasons including infections, genetic conditions, and injuries. Cysts don’t always require treatment. If they are bothersome they can be removed by a physician. When cysts become painful, it is often necessary to remove them.