Hi doc, I am male 26. In Nov '16 I had this hard lump on top of my left testicle with slight pain which also radiated out into my thighs. I consulted a urologist and after the ultrasound scan, blood and urine test he said its Epididymitis. After a month on antibiotics it was cured. Again after a few months the same condition appeared my right testicle. I consulted the same doctor he gave the antibiotics. Its gone but there is slight swelling on both epididymis and it has decreased my libido.