Undecided Question

Stretch marks helpppppppppppp?

Stretch marks question?
i am only 4^11 and 79 pounds but a pear shaped body. My fat seems to go into my butt and thighs and i have them there. I lost and gained weight because of anorexia. I had to gain 14 pounds within a month and got more stretch marks. Is there a way I can prevent stretch marks in the future. I dont want to have any more i know I am prone to them in the future when i'll get pregnent. My main question is if i Start to take care of my skin and drink more water and put more lotion and stuff will I prevent them??????????????????????????