Hi. Thanks for your query. The appearance of the vein like structure from the anus to the anus towards the scrotum - painful and uncomfortable with a of fluid filled pocket, and you drained it is suggestive of a fistula in ano unless proved otherwise. I would advise you the following: First of all stop fiddling with such problems as you may complicate more. Consult a General Surgeon for clinical evaluation and actual physical examination. MRI of the area for fistulogram Get started on appropriate antibiotics, metronidazole and probiotics and anti-inflammatory medicines Prepare for surgery if you want permanent relief as such tracts are nasty to treat.