since you mentioned there is no pain or swelling and your baby does not seem to be in any discomfort, i would suggest it is best to wait.
more than the procedure itself, your baby will be in discomfort staying at the hospital. in most cases, there is no treatment required if it does not swell or cause pain. in some cases, it also gets cured on its own. your baby's doctor will be the best judge to suggest further course of action.
http://www.webmd.com/parenting/baby/tc/hydrocele-topic-overview
Read more