Do people with mental illness have a genetic predisposition to it and then gets triggered from various environmental factors such as social events, school, or maybe for no reason at all? I'm asking because I had severe OCD when I was young, started at 12 years old or so. It consisted of me repeating ambiguous thoughts/phrases/words in my mind every morning before I started my day. The thoughts/words never made sense and could never be said out loud because it was just gibberish. I want to make it clear that I had complete control over this, I knew what I was doing was abnormal, yet I felt like "I had to do it or something bad was going to happen". Also, I want to make it clear that I was not hearing voices, I was actively saying these things to myself. There were no delusions either, I knew right from wrong, reality vs. unreality. It was severe OCD, I know it sounds bizarre and scary but for some reason I felt like I had to do it. I really had no good reason other than that by doing so it reduced my anxiety tremendously and I could finally go about my day because I felt more "complete" . I don't have this now, one morning I quit cold turkey, I grew out of it or I guess I wasn't afraid anymore. Also, when I was 19 years old, I'm 23 now, I got diagnosed with Multiple Sclerosis and Depression. They found several lesions in my brain and spinal cord and had some numbness/tingling symptoms over the last few years, however, this has nothing to do with the mental disorder, it's completely separate. I just find it interesting that I have both a psychiatric and neurological problem.
Any input would be greatly appreciated!