- Also: linea nigra
- Also: pigmentation changes
What it is
During pregnancy, your skin often undergoes noticeable shifts, from the appearance of a dark vertical line on your belly to changes in existing moles and new skin marks. These changes are a normal and common part of the physiological adjustments your body makes to support your growing baby.
One of the most recognized changes is the linea nigra, a dark vertical stripe that can appear on your abdomen, running from your navel down to your pubic area. This tends to become noticeable from the second trimester onward for many pregnant people. It’s a result of increased melanocyte-stimulating hormone (MSH), which is the same hormone responsible for other pigmentation changes you might notice. Beyond the linea nigra, you might observe a darkening of your areolae (the area around your nipples), your genitals, and even existing moles.
Additionally, elevated estrogen levels during pregnancy can lead to other visible skin changes. You might notice small, red, web-like patterns known as spider veins, or a general redness on the palms of your hands, called palmar erythema. Some people also find that skin tags, small benign growths, become more common during pregnancy, often in areas of friction. These are all typical occurrences as your body adapts to pregnancy.

