Hello there. Yesterday I started getting an itchy spot on my forehead. This morning I woke up with a bump where the itchy spot was on my head about 1.5 inches in diameter, protruding maybe an eighth of an inch or so. It feels a little hot to the touch and hurts a little when I press on it. It is not very discolored, maybe a little red. How long should I wait to see if it goes away before I make an appointment with my doctor? Thanks much!