Depends: varicocele?: If it is the left testicle that swells, then it may be a varicocele see: http://theturekclinic.Com/services/male-fertility-infertility-doctor-treatments-issues-zero-sperm-count/varicocele-symptoms-treatment-repair/ it could also be a hydrocele, spermatocele, hernia or (rarely) cancer.
Answered 9/28/2016
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