Why suddenly and frequently the right side of my face and ear turn red n get very hot. i can be sitting down and somebody tells me wats wrong why red?

Uncertain: Flushing is not uncommon, and can be triggered by emotions or things that dilate blood vessels (warm drinks, alcohol, certain meds). The fact that it is only happening on one side of your face is a bit more unusual. I would probably get it checked out, especially if you have other neurological symptoms on that side (numbness, skin sensitivity, etc...)