The linea nigra is a thin, dark line that usually runs from the top of your pelvis to your belly button. Skin discoloration, especially this one, is common during pregnancy and is nothing to worry about.

What is the reason of this?

The linea nigra, like chloasma, is the result of overactive hormones in your body that stimulate the production of melanin, the substance responsible for pigmentation. As melanin production increases, you may begin to see slight color changes in your body, especially in the linea nigra. Darker-skinned women are more likely to develop skin discoloration during pregnancy.

Tips

Some believe that folate deficiencies are responsible for the color changes, so it's a good idea to make sure your prenatal vitamin is rich in folic acid (the synthetic form of folate). Linea nigra can also be worse by UV rays, so it's better to be safe by applying sunscreen when going out on sunny days.