real ulcers will ooze waste for years, even possible the rest of the person's life. Often down on the legs and associated with eating allot of pork.
Regardless, waste coming out the skin is a sign of the liver / gallbladder clogged up or in need of help and as well the lymph glands unable to expel correctly.
Same cure for either reason.
You DO NOT want to allow your body to find a weak location on your skin and turn into the dumping grounds.