Make sure you get an adequate amount of vitamins, minerals and trace minerals
Externally:
Grape seed extract oil
Coconut oil
Aloe
Vitamin e
You also might try Retin A (if you can get it) or Retinol to stimulate collegen production - just be sure that you do use it at night and not any time soon before going out into the sunlight (and to avoid too much direct sunlight on the treated skin areas when you do go out in the sun, which you must do in order to have healthy natural Vitamin D3, or there might be pigmentation problems.