How long does it take for a woman to have a black line on her belly button?

Many women will experience various discomforts in their bodies due to pregnancy. Some will experience nausea, vomiting, loss of appetite, drowsiness, etc. Especially when the fetus is older, the skin reaction will be more obvious. Some people will develop pregnancy spots, some will develop stretch marks, and some women will have black lines on their belly buttons. What is going on? Let me introduce you to

Not only women, but men also have it in their abdomen. It is a linear band formed by the fusion of the aponeurosis of the abdominal muscles of the human anterior abdominal wall, with muscle fiber tissue attached to it. It runs from the xiphoid process of the sternum through the navel to the pubic symphysis. The formation of this line is like the midline that divides our belly into two parts, so it is an important anatomical landmark of the human body in medicine. This line itself has no function other than being the attachment point of human muscles. When not pregnant, this line is very light in color for most people, so it is often difficult to see. After pregnancy, this line on the pregnant mother's belly gradually becomes darker and more clearly visible, and is renamed the pregnancy linea.

The linea nigra is mostly formed between the 2nd and 4th months of pregnancy. This line is mainly due to the imbalance of estrogen and androgen secretion in the pregnant mother's body during pregnancy, which makes the pigmentation darker and heavier, causing pigment deposition in the lower layer of the skin.

1. The length and depth of the midline of pregnancy are different for each pregnant mother, which is mainly related to their personal physique, age, skin color, and hormone levels. Generally speaking, Asians are more likely to have pigmentation and darker skin than Caucasians.

2. For some pregnant women, the color of the midline of pregnancy becomes darker and thicker as the gestational weeks increase. Body hair may even grow in this area, or it may gradually extend upward to the chest. This midline exists. Of course, for some pregnant women, this line does not change significantly during pregnancy.

3. The formation of the midline of pregnancy is also related to skin tension. If the belly expands too much during pregnancy, the skin will become tense and cause an inflammatory reaction, which makes it easier for pigmentation to form dark deposits. The thinner the tissue or the more intense the hormone response, the more pigment will accumulate.

4. The time when the midline appears in pregnancy varies from pregnant mother to pregnant mother. Usually, the midline gradually appears after the pregnant mother's belly bulges. For some pregnant women, it becomes more obvious in the later stages of pregnancy.

Stretch marks are mainly caused by the breakage of skin tissue (collagen fibers) due to stretching and losing elasticity, which manifests itself on the skin as linear, sunken, and red lines. However, the severity of stretch marks varies from person to person and is determined by individual hormones, weight gain rate, and genetics.

The linea nigra that appears during pregnancy is a line that everyone has on their body before they become pregnant: it is a very subtle white line from the navel to the pubic bone. In the middle of pregnancy, some white lines will become darker in color and become a clearly visible black line. For some pregnant women, the black lines may even extend upward to the chest line.

Some care methods can also reduce the time this line appears. In the middle of pregnancy, you can apply some special anti-stretch mark lotions to the skin. When the skin absorbs the lotion, its elasticity will increase and its stretchability will increase, which is conducive to the disappearance of the black line. You can also apply olive oil, no more than 2 times a day, and continue to use it until the confinement period.