The red, itchy skin rash usually starts on the belly or back and face. Then it spreads to almost everywhere else on the body, including the scalp, mouth, arms, legs, and genitals. The rash begins as ...

It's most common on the: Keratosis pilaris rubra (KPR) is an inflammatory form of the condition that causes small, grainlike bumps and skin redness, primarily on the face, neck, chest, and arms.

“They appear as small, red, painful or itchy bumps that can develop pus-filled heads,” says the expert. This scalp condition is typically benign, according to research published in StatPearls in 2023.