The epididymis is a temporary storage area for sperm. The place where the sperm move out of the testicle and mature to the concentration required for impregnation. If you ignored the inflammation in the epididymis (did not receive treatment, or went through it too late, or were treated incorrectly, or did not fully heal), a scar forms in the epididymis, the epididymis becomes like a heavy thickened cord. Sperm cells either cannot penetrate through such a scar at all, or they penetrate, but not all: at best, this reduces the man's ability to fertilize. At worst, it leads to male infertility (more often with bilateral epididymitis). Acute inflammatory diseases (including epididymitis) do not go away on their own. Relief of symptoms is a clear sign that the disease is becoming chronic. And chronic epididymitis can quickly lead to infertility.