Hello, First of all could you tell us the exact ultrasound
report. A blood vessel problem commonly means a varicocoele, but there could be other causes as well.
If it is a varicocoele (enlarged veins around the testis), there is a slightly higher chance of the condition affecting the sperms (does not mean everyone with a varicocoele has an abnormal sperm). It is advisable to get a semen analysis
done to see what is the state of the semen and then decide on the further treatment. You have been asked to get a semen analysis to make sure it is okay. After the semen analysis report your doctor will advise regarding the next course of treatment.