<s>[INST] hi doctor.will a person beat himself or harm himself without knowing. i am getting lot of slaps invisibly and i can see the marks on my body especially on my back. scratching and finger marks..  not believing in spirits etc.. but just want to understand why and how this could happen? [/INST] HI! Thanks for this query!! it's definitely an interesting question... I would like to have additional information like what is your age, sex, background, where & with whom do you live etc. In addition, since when all of these problems have begun? When do you notice these injury marks & precisely on what locations. Jumping to any conclusions ranging from harming self involuntarily to "spirits" is premature. So don't worry.if possible get in touch with a psychiatrist as soon as possible for a detailed evaluation or if you are comfortable, get back to me with answers to my aforementioned questions. Good luck </s>