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What is a linea nigra?
Pregnancy

What is a linea nigra?

2 min readWeek 25
Key takeaways
2 min
  • Recognize that linea nigra is a normal dark line caused by increased melanin production during pregnancy hormonal changes.
  • Expect the line to appear in the second trimester and naturally fade within one year postpartum without treatment.
  • Avoid bleaching creams during pregnancy as they contain harmful chemicals unsafe for expecting mothers.
  • Protect your skin from UV exposure to minimize pigmentation intensity throughout pregnancy and postpartum recovery.
  • Understand that line appearance varies between women in width, darkness, and visibility - all variations are normal.

Linea nigra is a dark vertical line that appears on the belly during pregnancy, caused by increased melanin production from hormonal changes. This harmless pigmentation typically develops in the second trimester and naturally fades within one year postpartum without requiring treatment.

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During pregnancy, you will notice the formation of a vertical dark line on your belly. Known as the linea nigra, it is a common phenomenon and is directly related to natural changes in the body of expectant mothers.

Causes 

During pregnancy, pigmentation intensifies all over the body [1]. Under the effect of hormones, the skin begins to produce more melanin, which can accumulate to the point of creating dark spots in some areas, including the face, inner thighs, around the breast areolas, armpits, and abdomen [2].

Appearance

The dark line usually runs from the pubic bone to the navel or higher. The width and intensity of the line will vary from woman to woman [2]. Don’t worry if your line is barely visible, that’s normal too.

When does the linea nigra appear?

Increased pigmentation usually becomes noticeable in the early part of the second trimester and may become even darker in the final stages of pregnancy [3].

Skincare

There's no need to do anything to your dark line because it will disappear within a year after childbirth [2]. Avoid applying bleaching or lightening creams to your belly. Lightening agents can be dangerous for pregnant women [4]. However, make sure to protect yourself from the sun because the less the exposure to ultraviolet rays, the less intense the pigmentation will be [3].

Frequently asked questions

Yes, linea nigra typically fades naturally within one year postpartum as hormone levels return to normal. The line gradually lightens without requiring any special treatment or products.

Linea nigra usually becomes noticeable during the early second trimester around 12-16 weeks. The line may continue darkening throughout pregnancy, reaching peak intensity in the third trimester.

No, linea nigra is completely harmless and normal during pregnancy. It's simply a cosmetic change caused by natural hormonal fluctuations that increase melanin production in the skin.

You cannot completely prevent linea nigra since it's caused by pregnancy hormones. However, protecting your skin from sun exposure can help minimize the intensity of pigmentation changes.

Avoid bleaching or lightening creams during pregnancy as they contain harmful chemicals. Simply use gentle moisturizers and sunscreen to protect the area until it fades naturally postpartum.

Medical Disclaimer

This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or qualified health provider with any questions you may have regarding a medical condition.

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Medically reviewed content

Reviewed by healthcare professionals · Updated June 6, 2025

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