Is it normal to have purple veins on breasts?

I'm 22 years old. I have these purplish veins on both of my breasts. They're way more noticeable on my left breast that is bigger. I have a spider vein on the side of my left breast and my breast is covered in these purple dots with veins coming out. I think it's because that breast is much bigger and I'm extremely fair skinned. I did go to the dermatologist in December for boils on my arms. I did show her the spider vein that was next to the other veins and she didn't seem that bothered or concerned. She said it looked aggressive but that was because it was a deeper purple at the time. She didn't really care about it though. I did gain 50 to 60 pounds in under a year and it caused my left breast to get bigger and the veins are more visible where my breast bulges out. Just wondering if purple veins are normal.