Bumps On Outer Ear Red, Swollen, Hot Outer Ear And Rash On Arm?

Red, swollen, hot outer ear and rash on arm? - bumps on outer ear

Okay, so when I woke up this morning, my right ear is red, swollen, and it's really hot. I also wonder shots in five reds left arm (not really itch or anything). And yesterday, he had vomiting and diarrhea (all of which now seems to be better). What is that noise? Should I see a doctor? Can I ice on your ear?