Hello, my name is Nicholas and I am 16. I regularly perform self-examinations on myself, per my doctor's orders. Over the past year or so, I have noticed that my right testicle is starting to get more veins overtime. They aren't lumps, because they feel long and connect to other places. I haven't found any lumps at all. However, as a result, my right side feels heavier and a little larger than the left--especially when sitting down. By the way, my other side has maybe three noticeable vessels and nothing else. This is also not affecting my sex drive at all. Is this a cause for concern? What could this be? Thank you.