-itis means the part of the body is swollen, while -osis means the part of the body is damaged.
I found this out back in 2012, when I had a very nasty case of tendonitis in one of my feet, and I found out that the vast majority of cases of tendonitis should be called tendinosis instead, as it's pretty rare for the tendons themselves to swell; rather, the tendons themselves deteriorate from overuse.
-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.
In french we occasionally portmanteau -itis (often qualified with "acute" or "mild"), for a comedic yet genuinely emphatic effect. e.g: acute dumbitis/boreditis/tireditis
-itis means the part of the body is swollen, while -osis means the part of the body is damaged.
I found this out back in 2012, when I had a very nasty case of tendonitis in one of my feet, and I found out that the vast majority of cases of tendonitis should be called tendinosis instead, as it's pretty rare for the tendons themselves to swell; rather, the tendons themselves deteriorate from overuse.