If it's just in his belly region, then yes, constipation could be an issue. Fasting, as you are doing, may resolve this.

Melafix is herbal; it shouldn't hurt, but I'm doubtful that it will help, either.

Does the growth near his anus look red at all? It could be intestines prolapsing out.

If it looks like a reddish-brown wormy-growth, that may retract back in or fall off (and move independently), then we're dealing with inernal parasites.


~Ash