Thank you for asking Healthcare majic. My name is Dr Ehsan Ullah & I have gone through your query. hearing these scratching sounds in my head can have some factors related to your life style... a constant sense of thinking some issue, a stress factor, lack of sleep , over burdened life style or some fear etc. all these can lead to such condition. at times, there is some feeling of thrill or unpleasant sensation in an area where nerve of blood vessels are passing close of skin , which may be just for a while... first of all, you should stop thinking about this again and again and you may get this condition relieved still if this persists then don t worry and just visit your GP for clinical examination specially for neurological assessment. Brain diseases and issues don t usually present with symptoms like this. Hope this may help you. Let me know if anything not clear. Thanks.