The stretch mark is a vertical line that appears in the middle of the belly after pregnancy and starts to grow between the 3rd and 5th month of pregnancy. Stretch marks are an external manifestation of the skin due to changes in hormone levels in the body after pregnancy. From the third month of pregnancy, the hormone levels in the pregnant woman’s body fluctuate significantly, making it very easy for stretch marks to appear. The stretch mark itself is a kind of pigmentation, which is flat with the skin and has no effect on the health of the body, nor does it affect the growth of the child, so don’t worry. It is recommended that you do not use whitening products to apply stretch marks, most people’s stretch marks will naturally fade until they disappear about a year after delivery. If the stretch marks do not fade naturally or do not achieve the desired skin tone, you can try using vitamin E cream to apply.