Good word/phrase for crazy?


The context is like "He'll probably think I'm crazy." The expressions I see
mostly are 頭がおかしい and 気が狂う. I've also seen イカれる be used, but I've heard that's
really slangy. Are there better expressions to use than these and is there a
difference in nuance between these expressions?




"どうかしてる", or "どうかしている"




"どうかしてる", or "どうかしている"

