hello i am wondering whats is causing me to have a rash on my penis head and skin i been having it for almost three weeks now and my penis started to get dry as well i have tried to not scratch self down there but it has been real itchy i also have not discuss with anyone yet as of today I've have now gotten red bumps on my penis skin and urge of scratching myself and my penis head has been little patchy dry on it I SERIOUSLY AM CONCERN RIGHT NOW PLEASE HELP ME