A blue nevus is a benign type of mole. It may appear as a blue lump on the skin. A blue nevus may be present at birth or develop as a person ages. Healthcare professionals refer to more than one blue ...

A nevus sebaceous is a mole patch that is salmon or yellow-colored and most often appears on your scalp, neck, and face. They are less common on your arms, legs, and trunk. Sebaceous nevi usually ...

Giant congenital melanocytic nevi are large, dark-colored lesions on the skin. They’re generally not harmful but may increase your risk of conditions like melanoma. Treatments are available. A giant ...