We have a 12 year old gelding , who was gelded at age 2 with a swollen scrotum sack.It is not the whole sack but just the tip. It is also slightly hot to the touch.I cleaned him out thoroughly yesterday and inspected everything closely. He has no infections or injuries to his penis .anyone has any idea what else could cause this. I gave him a shot of penicillin yesterday and today but no change. He also seems to be uncomfortable , when he is standing he cocks his left hind foot continually.
Any help greatly appreciated.