Vasectomy, especially no-screw vasectomy, is a procedure that is considered to have a very low risk of complications. Complications are rare and usually mild, but it is important to be aware that they can occur.
In about one in one hundred patients (1%), a small ball of blood may form near a testicle. This is called a hematoma. It will cause some pain for a few days and does not require any particular treatment.
Infection, on the other hand, also occurs in 1% of patients and brings redness on the skin, pain and swelling. It is usually easily treated with an oral antibiotic (pill).
An accumulation of sperm in the testicle one week after vasectomy is called congestive epididymitis. This complication rarely occurs (0.5%). It creates pressure in the testicle that usually lasts less than a week and is easily treated with anti-inflammatories and ice.
Painful scarring of the duct or a small ball filled with sperm (granuloma) occurs in less than 1% of patients. Sensitivity will then persist for a few weeks.
Approximately 1 in 1000 patients (0.1%) will experience chronic pain following vasectomy. Certain treatments can be proposed to reduce or completely eliminate this pain. Unfortunately, some patients will remain with their pain for a long time.
No change in sexual function is reported. The vasectomy will not affect libido, erection, pleasure, sensitivity or ejaculation (remember that spermatozoa make up only 2% of what you ejaculate).
A small controversy arose after the publication in 1996 of a study reporting a possible increase in the risk of prostate cancer following vasectomy. Further analysis of these results, as well as the publication of several other analyses, have not, to date, demonstrated a link between vasectomy and the risk of prostate cancer. These studies have proven that vasectomy does not cause cancer, heart disease or any other disease.