Hijack — not from the questions posed by the OP but from the current trajectory of the debate, which is pretty focused on 12-step programs — what is a “disease”?
Me, my health sciences perspex come out of mid-20th century descendants of the original “germ theory of disease”. A disease, as far as I’m concerned, is
a) An illness caused by a bacterial infection; or
b) An illness caused by a viral infection; or
c) On rare occasions, an illness caused by other microbial infections (e.g, amoebas); or
d) By extension, when research shows that something previously thought to be a disease in one of the above senses turns out to be not due to an infectious microorganism, but rather a physical malformation or insufficiency, those may also be called “diseases”, but should fall into a category within a known and finite set of categories that have been accepted as such, lest everything that ever has the capacity to ail humankind get dubbed a “disease”. Generally accepted categories:
d[sub]1[/sub] Congenital diseases, in which one was born with damaged or insufficient physical organ structures which manifest as an illness; e.g., mitral valve insufficiency in the heart (born that way)
d[sub]2[/sub] Tissue-damage & organ-failure diseases, in which structures of the body cease to perform their proper functions long prior to normal onset of “old age” failures, and not as a consequence of traumatic injury, and those failures then manifest as a disease; e.g., diabetes
d[sub]3[/sub] Somatic misbehaviors, in which normal bodily functions or biological processes within the body veer from normative healthy patterns and engage in activities destructive to the otherwise healthy body, which in turn manifests as a disease; e.g., cancer
Now, that’s all a rosily science-brightened & confidently analytical take on medical practice (let alone social-cultural labeling, which I haven’t even gotten to). In practice, as I found out as I aged, ordinary medical doctors tend to slap scientific-sounding latin-derived labels on human ailments that make it sound like they know that what’s got you feeling miserable is in one of those categories and that, furthermore, they know which one, and in probably considerably more detail than that.
Then you learn a little Latin and get disillusioned. “I had a painful cough and I’ve been running a fever, so I went to the doctor and you know what I’m sick with? I’ve got bronchitis!” That’s an almost meaningless sentence. Or at least it sure doesn’t convey the kind of thing my nice systematic optimistic mid-century health sciences theories had led me to think it meant. “Bronchitis” means “a condition of the bronchial tubes”. Not specific as to what condition. Doesn’t mean there’s a specific microorganism, known to the medical profession and recognized as such by your doctor, a specific microorganism which causes bronchitis. Nope, your doctor essentially listened, poked, asked some questions, and then said “Hmm, something’s bothering your upper lungs, you got a cough and a fever, definitely something going on there”.
Doctor probably thinks its viral, if only because it’s more common, less serious, and spreads more often, but gives you some antibiotics anyhow (to kill off the bacteria that you may or may not have), recommends broth and tea and tylenol and get some rest.
So, given that the real state of day-to-day medical diagnostics in the clinic are a lot closer to broad general common-sense that’s enhanced by medical science knowledge than to highly explicit analytical determination of exactly what is causing exactly what damages by exactly what processes, does it make sense for blowhards like me to hold on so tightly to a rigid definition of “disease”? Why not just say “anything that makes you feel awful or disables you in any way is a disease”?
We can have mental diseases, emotional diseases, behavioral diseases, social diseases, spiritual diseases, why not? We may not know what causes them, we may not know what they actually consist of as opposed to the symptoms that lead us to diagnose them, we may not know what kind of package-deal connections they may have to other aspects of a person’s feelings & behaviors & overall health, and given all that we may not have any idea what, if anything, to do about these diseases, or whether what we do is an improvement over doing something else or nothing at all, but by Jove and by Golly we’ve given it a name.
And the cool thing about giving it a name is that if any portion of its manifestations are troubling and unsettling to me or you, we can say that that manifestation is caused by the name we just gave it. It has an explanation! It has a reason!
People who have a tendency to have all their skin fall off overnight and wake up screaming in excruciating pain? It’s because they have Skinfalloffitis! People who suddenly start stabbing other folks with stainless steel forks do that because they suffer from Forkustabbia! The person who chronically lies for no apparent reason, well, you know, it’s because of the Pantsonfirosis!