When losing weight, your skin begins to shrink down with your body. While less strain is being placed on the skin, that does not necessarily mean that the damage done previously will be reversed.
It is quite common for bodybuilders to develop stretch marks unexpectedly. Most bodybuilders don’t have skin-related issues in mind when they start lifting weights.
Stretch mark creams can help fade older stretch marks by making the uppermost layers of skin less translucent, and thus reducing the appearance of those stripes.
There are a variety of treatment options for stretch marks on your buttocks. They may help to lessen the look of stretch marks, but they won’t cause them to disappear completely.