Detailed answer

Stretch marks, also known as striae, are caused by the rapid stretching and expanding of the skin. They commonly occur during periods of growth such as puberty or pregnancy. Stretch marks are not related to nerve damage but rather the result of the skin's inability to keep up with abrupt changes in size or shape. They typically appear as pink, red, or purple streaks which gradually fade to silver or white over time. While stretch marks can be bothersome cosmetically, they are not a cause for medical concern or an indication of nerve damage.