Swollen left testicle and pain in left flank?

For around a year now I’ve had a swollen left testicle and pain in my left flank, mainly around my abdomen but sometimes also extending to my lower back. The pain is never sharp or very pronounced. Sometimes the pain seems to be centered on my left testicle, other times it seems more focused on my lower left abdomen, feeling like a minor stitch. I went to the doctor a few months ago and was diagnosed with epididymitis as the doctor’s examination showed that the testicular swelling was located in the epididymis, not the testicle itself. However, a urine test came back negative for epididymitis, and also for chlamydia and gonorrhea, and, the prescribed course of antibiotics have not solved the problem. My libido also seems lower than it used to be, but this may well be due to my anxiety about what the problem is. Does anyone have any advice about what this could be?

sound like it could be a varicocele. this can cometimes be hard to detect if it has not developed to grade 2 or 3. varicicele is a dilation of the pampiniform vein (the vein leading from the teste). it is present on the left in something like 70% of cases. Most doctors do not know this, but it can impair testosterone production, which would account for your anxiety. the pain of a varicocele is usually dull and can feel like heaviness in your testes. it can also radiate to the abdomen and inner thighs
a urologist will be experienced in diagnosis.

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