My sister is being real weird since past 2/3 years. She suddenly starts running and then stops ,smiles and murmurs something (while watching TV, having dinner) she does not concentrate on what the other person is talking to her she just smiles talks to herself (which kind of freaks other people like her classmates or friend) due to which nobody talks to her in class/tuitions. Recently she started to talk to herself loudly and kind of remain usually in deep thought and would on the bed for the whole day and when somebody interrupts her she gets agitated and mannerlessly shoos the person. Once she told me 'get out of my room you're not my sister There's lot more weird things about her that I can't tell here. Her concentration to do any work is lacking day by day. Her grades are getting worse and worse. I don't if these requires some serious treatment. I don't whom to contact. Please help out.