-opathy would generally be suitable. It implied a pathological condition involving some form of tissue damage or dysfunction.
Minor clarification, swelling does not necessarily always mean inflammation. -itis refers to inflammation of an organ or area of the both. Swelling, particularly when from fluid retention, is referred to as -edema. There is overlap though. :)
I think it's actually about taking "medicine" that causes the same (the homeo part) dysfunction (the pathy part) as you're experiencing in the hopes of curing it.
Minor clarification, swelling does not necessarily always mean inflammation. -itis refers to inflammation of an organ or area of the both. Swelling, particularly when from fluid retention, is referred to as -edema. There is overlap though. :)