I'm a 20 year old girl and last year, my veins just became extremely visible all over my body. Before then, you couldn't even find my veins. I had to get blood drawn a couple years ago and the doctor had to try 9 times before she found a vein. Now, you can very clearly see them, especially on my chest, breasts, and legs. I've been trying to find out why they suddenly became so bright but I can't find anything. I haven't lost weight. If anything, I've gained some and I'm a bit overweight. I don't drink that much water, and they're visible even when I'm cold so it's not the heat. I don't know what caused it but it's embarrassing and gross. I really want to find a way to make them less visible, even if it's just a little bit.