Onion Extract: Make a paste of onion and apply it to the stretch mark areas. You can apply at least one hr before bathing as it has a strong smell.At least three months it should be done to gain benefits. If you find the smell too strong during bathing, you can apply any natural bath salt
Eating Walnuts: Walnut contains copper which in turn helps to build collagen and heal the stretch mark. Do eat around ten walnuts per day to boost the collagen development.
Keep yourself hydrated: Water keeps the body moisture balanced. The skin should be well hydrated from inside.
Vitamin C: Eat a lot of fruits containing vitamin C. It helps to minimise the stretch marks. Vitamin C is useful in healing scar tissues.
Do not forget stretch marks are the map of motherhood. Enjoy them with a pinch of salt.