Veins on the back of my leg ;(?

I am 5'6 (170 cm) I weigh 62 kilograms (136 pounds) ..and im 15 years old..I have a vein on the back of my leg that sticks out and its blue...its a varicose vein and I have been at a doctor who told me to remove it...its not that biigg but its not small either...But do you think that I can wear shorts and skirts??do i have to lose weight to prevent these varicose veins?? THANK YOU:):)