Dermatology Concern is a medical specialty that focuses on the diagnosis and treatment of diseases related to the skin, hair, and nails. A common dermatology concern is cysts, which are closed sacs filled with fluid or other material. Cysts can be caused by a variety of factors, including infection, inflammation, or trauma. They can range in size from very small to large and can cause pain, itching, and other symptoms. Treatment for cysts typically involves draining the fluid or surgically removing the CYST.