Some idioms with "head"

Why should you learn English idioms? Because if you don't know these non-literal expressions you will be puzzled when English-speakers use them; you will "scratch your head". As with many phrasal verbs, it's more important to understand these idioms than to use them. Here's a link to Shanthi Cumaraswamy's great blog "English with a twist", where she gives us some examples and explanations of idioms using "head". http://englishwithatwist.com/2014/09/05/12-english-idioms-with-the-word-head-that-you-can-use-everyday/