Hi welcome to Health care magic forum. As you describe the swelling appears to be an abscess
formed by a pus pocket in the skin of the scrotum
. As the pus oosed out it appears to be only skin deep other wise it would have opened to the inside, and there would have been complications, With suitable drugs it will be closed automatically with out any problem. No manipulation is necessory.
Besides i advise you some diet recommendations as Avoid taking potato, other tubers, pulses, fish, and things made of pulses as these may increase the pus.
Take more of green leafy vegetables, milk, egg, meat, fruits, juices, and dry fruits.to have a smooth recovery. Wishing for a smooth recovery and thanks for calling.