Despite all precautions, having a vasectomy
involves risks such as the following:
Mild inflammation to serious infection or abscess may occur in the skin, vas deferentia, or testicles. Treatment may include observation, antibiotics, or very rarely, surgical treatment.
Blood clots or bruises usually clear up with no intervention. In some cases medical or surgical treatment is needed.
Very rarely, skin attaches to the vas or a connection is formed between the vas and skin — a fistula. This may require surgery.
Fluid build-up in the scrotum may clear on its own, or it may need to be removed surgically.
Swelling caused by leakage of sperm from the vas deferens. Usually resolves on its own, or it may require drainage.
There may be temporary discomfort or pain in the testicles. Pain may be chronic and severe. Post-Vasectomy Pain Syndrome can affect up to 1% of patients.
The cut ends of a vas deferens may grow back together. Rarely, the tubes grow back together again and pregnancy may occur.
Decreased sexual desire or inability to have an erection is reported in about four out of 1,000 cases. The most likely causes are emotional — there is no physical cause for sexual dysfunction associated with vasectomy.