“Normally, you cannot see or feel the veins
in the spermatic cord that carry the blood from the testes. If you have a varicocele, the veins
become bigger (they enlarge or dilate) and this makes them more prominent. It is similar to varicose veins
of the legs. The size of a varicocele can vary. A large varicocele is sometimes said to look and feel like 'a bag of worms' in the scrotum
I would suggest you see a surgeon at the earliest. Hope this helps.