Linea nigra is the medical term for the dark vertical line that appears on a pregnant woman's belly during pregnancy. It is darker in color than the surrounding skin, and it extends from the top of the belly down to the pubic hair, running through the belly button. The reason for the development of the line is probably related to hormonal changes; after pregnancy, the linea nigra usually disappears. The darker your original skin color, the longer this will take, so it may take a year for the linea nigra to go away in some women. Sometimes babies, who share their mother's hormones before birth, will be born with a similar line that also fades over time.
During the 9 months of pregnancy, a woman’s body goes through extraordinary changes. If this is your first pregnancy, you might be astonished by the number of small surprises that you discover during your term as a result of pregnancy’s effect on the skin. One of these may be a thin, darkish line that runs from the naval (belly button) to the pubic area. This line can also extend from the pubic area through the naval to the top of the belly. No need to worry, though! This is linea nigra, a common – and harmless – skin condition of pregnancy.
When you become pregnant, body changes are guaranteed. Your physique, moods, and energy levels will alter as your baby develops. Pregnant women also may encounter changes on their skin. A dark line extending vertically down the abdomen (linea nigra) is one example. Another common example is striae, also known as stretch marks.
Of all the common skin conditions caused by pregnancy, pruritic urticarial papules and plaques of pregnancy, or PUPPP, is probably the one that women find the most frustrating. Similar to linea nigra and striae (stretch marks), PUPPP is benign and harmless to the mother and unborn child. However, this fact doesn't lessen the discomfort and often annoying effects on the skin caused by PUPPP.