Hi guys im 21 years old and i weigh about 120, so im really desprate to gain weight...so i started weight lifting about a week ago and im on creatine, and have been eating at least 4000 calories a day (3000 cal from food and 1000 from protien shake, and i have been getting enough protien and some good fat). Yesterday i looked at my right shoulder and i noticed some strech marks starting to form!! Now how can i prevent future strech marks?, why am i getting them!, Can i get rid of them? thanks all