Im sorry but I need to disagree here. even healthy people question their sanity, their health issue, their life situations. its just part of being a human being with a thinking brain.

human beings learn to question their health the first moment they encounter something they dont understand. example my daughter and son are under 5 years old, they have a very healthy mind and I spend a majority of my time with them listening to their questions about their self, their body and what they are thinking about.

also this poster is 17 years old. the teen age years are full of questions about their self, their world and the way they think, its a time of puberty\hormones out of whack and eye opening experiences of peer pressure to think and behave like their friends and when one doesnt conform to their friends thinking and behaving teens naturally think something is wrong with them mentally and they must be crazy or what ever the terms teens now use for someone who may be naturally different and not in with the accepted crowds.

most times what a teen questions about their mind and body is in fact very normal, non mentally disordered mind. its just the age to be this way for most teenagers.