I Have Stretch Marks (Upper Arms,thighs,hips,breasts,calves,abdomen)how to Make Them Improve and Make Skin Tighter? (photo)

I'm 20 years old, F,Asian half Filipino/Japanese (don't know if this info helps) ht is 5'3 and current wt is 53 kg...I used to have stretch marks when I was 9, due to rapid growth I think...I was always the tallest at that time and went through puberty faster (compared to other Asians of my ethnicity) and growing I also gained wt...being 78 kg being my maxed...started losing weight when I was 17.They look better now but I was wondering if it affected my skin tightness?? specifically my arms