Hydrocele is commonly found clinically and it is associated with patent processes vaginalis. The exact causes of this disease have no been proved up to now however monthly this disease disappears in twelve months after birth but some cases remain. For the treatment we do hydrocelectomy and although the rate of complications were low, sometimes the complications result in reoperations of children. Form the view of oriental medicine, hydrocele is included in susan(水疝) and this treatment originated from naekyung(內經). In this case, we got good results after treating a boy at the age of twenly-five months by bojungikitanggamibang therefor we want to annoume this.