Im the same I started using a type of oil before surgery – and my nurse said to use on post op week 1 visit but like charlotte says to be careful of incisions. So ive been doing this after my shower.. it defo helps with the tightness I think and so far no stretch marks, but i think this is pot luck you either get them or you dont, the same with being pregnant. Ive also been told I can start putting on the scar treatment gel after week 3. I have dermtrix gel pads and the gel ointment.