What can i do to reduce, stretch marks on both shoulders.

Nothing: If the stretch marks are already white there is not much you can do. Try not to get tan so there will be less contrast between your skin and the stretch marks.

Nothing: Stretch marks are tears in the skin cause by weight gain. They can be covered up, but not improved by creams and lotions. The only possibly effective therapy is cosmetic plastic surgery, but that's a big step for a non-health and non-life threatening problem.