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1.The history suggest most possible cause could be
varicocele - dilated venous channel which could give the above symptoms.
2.In this case i would request to get an
ultrasound examination done, the ultrasound will help to evaluate the varicocele - with the help of
valsalva maneuver the venous channels are measured.
3.This need to be treated as in future can be possibility for
infertility.
4.At the same time the scan would detect presence of any infective / inflammatory changes.
5.Suggest to see any surgeon in Lahore and get the needful investigations and treatment accordingly. Good luck.
Hope i have answered your query.
Any thing to ask do not hesitate
http://doctor.healthcaremagic.com/doctors/dr-ganesh/62888 Thank you.