From Yahoo Answers:
I have really aggressive thoughts sometimes. I don’t even understand why I have them. Usually (not limited to) they’re about hurting people. I feel really crappy about myself after these thoughts. I won’t go into all of my thoughts because some of them are really disturbing and they come out of no where sometimes. It’s surprising and then I start feeling like maybe I’m just a really evil person although I’m considerate of other people, most of the time.
I have a heart but sometimes I feel like how can I have a heart with these thoughts in my head! They don’t pop up in my head unless I think about it.
So then I thought well these thoughts might be schizophrenia, I started looking up what schizophrenia was. Then right as I saw the symptoms and examples of the symptoms I started like displaying the symptoms in my head. It’s almost like once I absorb an idea my mind plays on it. Like when I saw this CSI episode where this person got poisoned with Cyanide, I started worrying about cyanide poisoning. When I read the symptoms of Schizophrenia where you have like hallucinations (Like voices in your head) I started making a voice in my head. Once these ideas are in my head I can’t get them out. It’s like they become apart of me. Like sometimes I think “what if” all the time for every symptom of schizophrenia. Like people watching you. I started thinking: WELL, WHAT IF someone was watching me. Errr! I can’t get these thoughts out of my head and I think I’m starting to convince myself that I have schizophrenia. I’m scared. I feel like a sicko. My mind is also very contradicting: Like if I say I’m not a bad person my mind says “yes you are” and really self-deprecating thoughts. Every time I want to feel good about myself my mind will convince me that I shouldn’t and that I’m a sick freak who thinks horrible thoughts. I’m 19 about to be 20 soon and I heard schizo starts early 20s. I just don’t know what to do…I don’t have any insurance to go see a doctor. I’ve been a worry-wart ever since I was in elementary school. Also, like schizo, I heard you hear voices in your head and you believe what they’re telling you. Like let’s say something says, “This is God talking to you!” and I’m an agnostic and I don’t really believe in God. I like create scenarios and voices in my head ever since I heard about schizophrenia. NEVER before. It’s like my mind is trying to give me these symptoms it’s hard to explain. It’s like I know they’re my voices but I don’t understand why my voices are saying these things. It’s like WTF? :\
A most interesting case. This is a completely clear-cut case of OCD, screaming loud and clear across the landscape. I won’t tell you how I know this, but I know this illness like the back of my hand, since I have it. Been there, done that, ok? Not that subtypes matter, but this person has a couple of subtypes of OCD. The first is Harm OCD. The second may as well be called Schiz OCD. This is a person who starts to worry that they have schizophrenia. In the case above, he is starting to invent crazy voices in his head due to his fear. These voices in his head are causing him to worry that he had schizophrenia. This person clearly does not have schizophrenia. First of all, the voices in the head. The person with schiz hears these as actual voices with his ears, the same you would hear the voices of the people around you. The voices sound just like the external voices of persons near you, so much so that it is hard to figure out who is really talking and what’s just a hallucination. So the voices are not really in the head but in the ears, so to speak. We all have internal voices in our heads that we hear all day long. Nothing to be alarmed about. The “what if” questions are typical of OCD. A person with schizophrenia or other psychosis simply says, “People are watching me.” If you try to question them about the belief, you run into a brick wall and get a big argument. It’s a rock-solid delusion, and all delusions are hard as stone. The person also has “contradictory thoughts.” This is unfortunately quite common with OCD. The person thinks a good thought, like “I’m a good person,” and the OCD chimes in with a contradictory thought saying, for instance, “No you aren’t. You’re evil. You’re the most evil person on Earth.” These thoughts will probably be violently resisted. When doing differential diagnosis, look first of all at how hard the person fights or resists the thought. The more ferociously the person fights or resists the thought, the more likely you are dealing with an obsession. A good rule of thumb is: If you try to stop the thought, it’s an obsession. Unfortunately, clinicians understand OCD very poorly, and I doubt if this person is going to get a good diagnosis or treatment. In particular, OCD patients these days are often diagnosed as psychotic and treated with anti-psychotic drugs.