I have what feels like a cold no sorethroat nor fever a day ago a itchy localized rash on my chest came thats slightly risen red spots. what is this?

Doctor can evaluate: Rashes can be hard to figure out without looking at them. Cold symptoms can be seen with colds, strep throat, flu, allergies, etc... A rash can happen sometimes if a person's body is reacting to the germ causing the cold symptoms (sort of like an allergic reaction). Strep throat bacteria can make a toxin that causes reddish rashes. Over-the-counter antihistamines may decrease rashes and itching.