A mass from the scrotum. If a varicocele is large more than enough, a mass similar to a "bag of worms" may very well be visible previously mentioned the testicle. A lesser varicocele might be too modest to view but obvious by contact. So in many ways, it's a cycle. https://www.sgvascularctr.com/what-are-veins-and-why-should-i-know-about-them/