There are few medical conditions that will prevent a vasectomy from being done. If you have had surgery in the scrotum (like surgery to lower a testicle), an abnormality of the scrotum (like a varicocele–veins around the testicle or hydrocele–fluid around the testicle), these will be reasons for further discussion with our doctor. If you have diabetes, it is important to have that in good control prior to vasectomy.