The clinical manifestations of severe varicocele: 1. the varicose blood vessels can be seen in the scrotum in the form of loops or earthworm-like protrusions, and the scrotum can be obviously enlarged. 2. there can be an obvious feeling of scrotal swelling, and the symptoms are aggravated by activity. 3. testicular atrophy can occur, and the volume of the testicle on the side with severe varicocele is smaller than that on the normal side, and the testicle is slightly softer to the touch than that on the normal side. 4. The testicles on the side with severe varicocele have a smaller volume than the normal testicles and are slightly softer than the normal testicles when touched. 4. The varicose blood vessels in the scrotum will not retract or return to normal even after resting in a flat position, and the varicose blood vessels will always be within the scrotum regardless of the change in position or the degree of activity. 5.