The procedure can occasionally trigger a faint (or vasovagal episode) in a small number of men. If this was going to happen it would occur within 30 minutes of the procedure while they are still in the clinic. This is treated quickly and very effectively with a drug that reverses these unpleasant feelings.
Some men experience swelling and discomfort after day 4. This is due either to infection or bleeding (haematoma). Bleeding is usually related to over activity in the first week after the procedure, and swelling due to a haematoma is treated with supportive underwear, warm compresses and pain relief. Infection will need antibiotics and rest.
Occasionally a lump becomes noticeable above one of the testicles at about 3-5 weeks after the surgery. This is usually due to a collection of sperm at the lower end of the vas. This gradually resolves with the use of ibuprofen and supportive underwear.
Chronic pain or post vasectomy syndrome after a vasectomy is rare, it is when pain is ongoing for some months after a vasectomy. It seems to be reduced by a minimally invasive approach and an open ended vasectomy, both of which are provided at the Sydney Vasectomy Clinic.
Vasectomy failure, is the persistence of sperm in the ejaculate 6 months after the procedure. This is rare and occurs about 1 in 10000 cases when the 2 ends of the divided vas manage to reconnect through early scar tissue, or when an individual has 3 vas and the third is still functioning normally. The reason is usually diagnosed by ultrasound if consistent specimens still have sperm.