Dermoid cyst is generally benign and present at birth but are often diagnosed only later in life, and an association with pregnancy is commonly reported. It's a sac-like growth that contains structures such as hair, fluid, teeth, or skin glands that can be found anywhere in the body, most commonly on the face, inside the skull, on the lower back and in the ovaries. They grow slowly and are not tender unless ruptured. The best treatment is a surgical removal, superficial dermoid cysts (ones near the surface of the skin) on the face can usually be removed without complications. Removal of other, rarer dermoid cysts requires special techniques and training.