At times it stings/strikes me inside my head?is it cause of sleep or cold or something else?

Stings within the he: Several studies have indicated that EHS is significantly underreported, and in fact, many patients very rarely report it to their doctor because they are ashamed, or because they are met with incredulity or disbelief. As of 2014, no clinical trials had been conducted to determine what treatments are safe and effective; a few case reports had been published describing treatment of small numbers of people (two to twelve per report) with clomipramine, flunarizine, nifedipine, topiramate, carbamazepine, methylphenidate.[1] However, more and more studies suggest that education and reassurance can actually reduce the frequency of EHS episodes