Hydrocele or Hernia

Patient: Hydrocele or Hernia: My son is 18 month old and he has swelling like on urinarial ball , some time it get in normal shape and some time get big , its not paining and even childs weight and health is ok .doctors says its hernia and need a small surgey to block some vain .. thankful if you can guide some good ayurvedic medicine for him .