A cyst is a small pocket of tissue often filled with fluid or pus. It can occur due to an injury, infection, or other issues. They’re usually benign but may need treatment for complications. A cyst is ...

Ganglion cysts are small, benign, fluid-filled sacs that usually form on or near a joint or the covering of a tendon. If they cause pain or difficulty moving the joint, a doctor may remove them. These ...