The OLD DOCTOR used 3 tablespoons of Epsom's Salt 3 morning in a row as a purge to get people JUMP STARTED back to living. I HAVE MY Lower Bowel Balance, so I do not bother with Epsom's Salts, but for those with immediet problems, that is the fastest cheapest route to remove the waste from the intestines and you are correct, you had better not stray far from home if your wanting to put the disease in the toilet in just 3 days.
The mass on the skin sounds like it is small. Odds are it will expel and pass quickly. Cleansing the liver is the only real cure for the skin, but you can treat it locally by applying a wet wash rag on it for as long as possible, the body will respond by expelling quicker. Actually a person is suppose to be able to apply water to a cancer lump for 10 straight days and expel it, even a bullet wound is suppose to come to the surface with 10 days of cold dripping water on the wound.
The BF&C or B&W ointments work ok, but I would just keep it clean and let it do its thing. making sure the bowel is working well is job one to have clean skin.
Most people do not realize that while in a hot tub almost 1/4 cup of fecal matter expels out the skin into the tub from the average constipated person. There should be a rule posted by every hot tub, "IF" YOU DID NOT HAVE 3 BOWEL MOVEMENTS TODAY, GO AWAY!