Stretch marks are lines or grooves that can appear on skin that has been stretched excessively as a result of growth, pregnancy, or weight gain. Prolonged use of topical or oral corticosteroids can also cause stretch marks. Fortunately, there are laser remedies for stretch marks that can help eliminate them.

In definition, these are skin stretching injuries. They usually occur during growth (in the adolescent stage), weight changes, or when there is a pregnancy that causes great stretching of the skin.