What can be done to improve the appearance of stretch marks?

Difficult to treat. Patients often come to see me for stretch marks. These are quite difficult to treat. If they are newer and red, i often use a blood vessel laser to treat the redness. If they are older and white, retinoids products may help to encourage new collagen to form, though irritation from the product may limit it's use. Fractionated lasers such as fraxel may also help.
Mederma. A product called mederma may be helpful. If not you should see a dermatologist or plastic surgeon.