You may not think of stretch marks as being scars, but they are. Stretch mark patterns tend to resemble animal prints. Some refer to them as “tiger stripes.” To conceal stretch marks, it’s best to work with the depth and breadth of the patterns rather than against them.
As you would with other scars, stretch marks need time to heal. If stretch marks have not yet healed, reopening the wounds will reset the healing process causing the appearance of the tattoo to change unpredictably. Also, it takes time for stretch marks to form a set pattern. For these reasons, old stretch marks are the safest to tattoo over.