Looking back on myself, my mother and her sisters, and her mother before her, we've all had some varying degree of mental illness. So, I guess mental illness is something that can be hereditary or genetic. I've seen news reports where they've discovered certain genes and gene mutations that are linked to mental illness, so it wouldn't be far fetched to think whatever plagued my grandmother was passed on to my mother and her sisters, and then on down to me.

I'm beginning to see how deep the rabbit hole does indeed go now.