 [ Symptoms ] about 6 months ago i got a catheter due to urinary retention from benadryl will vistaril do the same  i took 40 pills of benadryl 1000 mg and had to have a catheter installed to drain my bladder will taking one hydtoxyzine 25 mg give me urinary retention [ Disease ] there is really no way to specifically and accurately address this question without an examination so i would strongly suggest that you see a urologist or the surgeon that performed your surgery there can be many types of intrascrotal masses hernias hydroceles varicoceles spermatoceles cysts or even tumors properly identifying your sack of fluid is essential either by examination ultrasound or both