Stretch marks are often caused by the breakage of the elastic fibers under the skin after the belly is stretched during pregnancy, which can lead to some depressed scar tissue on the skin. In fact, when the stretch marks are just about to start, applying olive oil topically can really slow down the onset of stretch marks or make them more severe. However, if you apply olive oil after the stretch marks have already appeared, it will not have a good effect on removing them. Once the stretch marks occur, it is usually recommended to start the treatment after the pregnancy is over and after the breastfeeding period. It is also recommended that patients can be treated with laser lightening.