The idiom 'put a hex on me' is used when you want to convey the idea of bringing curse on yourself. 'Hex' is a word that is used as a verb to describe the phenomenon of using magical powers to bring a curse on somebody and 'put' is a word that describes the phenomenon of giving somebody a proper position. So when you want yourself to be in bad condition you can use the idiom.
But as the above mentioned idiom has the word 'me' as its part it is hardly believable that somebody can say that as nobody would like to bring curse on himself. So this way the use of the idiom is hardly found in our daily conversation and be used in some extreme condition.
But as the above mentioned idiom has the word 'me' as its part it is hardly believable that somebody can say that as nobody would like to bring curse on himself. So this way the use of the idiom is hardly found in our daily conversation and be used in some extreme condition.