Hi,
It appears that you have varicocele of the left side of the scrotum
"Varicocele is an abnormal enlargement of the veins in the scrotum draining the testicles. The testicular blood vessels originate in the abdomen and course down through the inguinal canal as part of the spermatic cord on their way to the testis. Up-ward flow of blood in the veins is ensured by small one-way valves that prevent backflow. Defective valves, or compression of the vein by a nearby structure, can cause dilatation of the veins near the testis, leading to the formation of a varicocele"
en.wikipedia.org/wiki/Varicocele
Varicoceles may affect male fertility, hence early intervention is advisable based on the extent of the problem.
Treatment measures include embolization or surgical correction.
You can discuss these options further with your urologist.
Meanwhile, wearing supportive underwear can prevent further swelling along the veins.
Do keep us posted on your doubts and progress.
Regards
it is by my left testi and its is lumpy