Nowadays, women are more aesthetic and are more concerned about the appearance of stretch marks after pregnancy, it varies from person to person, some appear in the middle and late stages of pregnancy: for example, in the 5th month of pregnancy, stretch marks appear on the lower abdomen, and there are very few women who never have stretch marks. When these stretch marks appear, most of them are dark red if you are pregnant for the first time, and white if you have a full-term birth, a second child or more. Stretch marks are caused by the growth of the fetus in the uterine cavity, which elongates the muscle fibers under the skin of the abdomen. Some sensitive women may also experience itching in the lower abdomen, and if the itching is severe, they need to use anti-itch medication, such as glyburide lotion, for anti-inflammatory and anti-itch treatment. However, there are a few women who may never have stretch marks due to the small fetal development, which is normal. Most women, after pregnancy and delivery, will be able to tell if they are pregnant for the first time or if they are pregnant during delivery by judging the color of the stretch marks. The majority of women will have stretch marks after pregnancy, usually after the middle of pregnancy, if no stretch marks appear is also normal.