Comment by tootie

I was diagnosed a while back with a chronic neurological disorder. One that has a heavy effect on my mood and can conversely be triggered by my mood. The underlying cause is scientifically proven to be physiological. I lack a specific neurotransmitter due to inactive cells in my hypothalamus.

For a long time I wrote off my symptoms as being all in my head. And after a formal diagnosis, I am 100% certain they are all in my head because that's where my brain is. Symptoms are also unequivocally psychosomatic. What I'm feeling can influence my physical symptoms and rather abruptly at that. It's right in the definition of the illness. None of this means that disease is imaginary or not real or I can talk myself out of it. It's as physically irreversible as losing an arm. There are some very good treatments, but I will never ever be cured (barring a miraculous breakthrough).

While the causes of mood or personality disorders are less well understood, it seems entirely plausible that they can be just a physically inevitable. Every thought, feeling, sensory input and motor output is a physical process originating in your brain and your brain can malfunction if it's ill. And we can treat illness with medicine.