itchy red rash start on head spreading in minutes

help please please this is the second time this is happening to me since the 12th of may that being the first time today being the second (14th june) the first time i woke up to my teeth feeling wired so i brushed my teeth to try get rid of the freeling then all of a sudden my head really really started to itch and that spread to the WHOLE of my body and i just could not ignore it and ended up schatching my self almost to ribons tonight i was awake and again my teeth felt wired (like when u been clencing ur teeth together for a long time ) so again i brushed me teeth to get ride of the felling and again the itching started on my head and spread very quickly to the whole of my body and both times have been at silly oclock in the morning its now 4.33 am and i'm still itching like mad and really cant take this much longer my skin looks red with what looks like small white lumps but its smooth the skin on my head and forehead  feels  (for lack of a better word )  thicker
please help because this is driving me crazy and i know i will end up serusly hurting my self from scratching as i cant stop

[jagesh50]

You have acute urticaria or hives as it is known.Take cetrizine or benadryl cap 1 immedietly.If persist do go to emergency,do not drive your self.