Columbus City Schools Superintendent Angela Chapman apologized Tuesday for an administrative decision to change students' names to their legal names and their genders to match the biological sex ...

Melanonychia, also known as a dark or black line on the nail, causes a streak of dark pigmentation that runs along the nail bed. It can be a normal color variation, especially in people with ...

Hormonal changes during pregnancy can darken your nipples, areolae, and moles. It can also cause a dark line (or linea nigra) down the center of your lower abdomen below your belly button.