Causes A medical condition: This could be a testicular infection, cancer, or surgery. Overheated testicles: Causes include an undescended testicle, a varicocele, or varicose vein in the scrotum, the use of saunas or hot tubs, wearing tight clothes, and working in hot environments. Ejaculation disorders: If the ejaculatory ducts are blocked, semen may be ejaculated […]