What Causes Intermittent Flushed Feeling In Skin And Itching?

Twice in the last week I ve had brief episodes of a flushed feeling in my skin and itching. first was early in the morning, about 5 am, reading and drinking a cup of coffee. second was this afternoon, flushed skin starting at neck and scalp...going to arms, chest, back and then thighs. forearms are itching. pulse was 79, normal for me is 65; BP was 145/88, normal for me is 125/78