Everything you should know about this common condition. What causes Varicocele? How is it formed? Why does it sometimes harm testicle or decrease sperm production, whereas other times it has no symptoms at all? What if there is concomitant Hydrocele? When is Varicocele operated in children? Do we operate every Varicocele, even in cases of severe oligoasthenospermia (oligospermia with decreased sperm motility)? What do we promise to the patient? Is there reason to freeze sperm before surgery? Why are the Palomo technique and the Laparoscopic procedure abandoned? How is the patient followed up postoperatively? Final answers, based on scientific evidence.