A glomus tumor presents as a small, blueish bump in the skin, typically located on a finger or toe, near or underneath the nail. The bump is sensitive to touch and can be more painful if the limb is exposed to hot or cold temperatures. These tumors arise from the excessive growth of nerve structures that typically regulate blood flow and temperature in the skin. Although they are benign, they can be removed surgically if needed.
A highly sensitive, small, purplish growth made up of tiny blood vessels and nerves, most commonly found beneath a fingernail or toenail.