Erythema occurs when your skin becomes red due to increased blood flow to the surface. This is different from a quick blush. A skin reaction or irritation might take a bit more time to resolve.
In some uncommon situations, it might indicate potential health concerns, such as rheumatic fever, lupus, or fifth disease. Let's explore more: https://www.southlakegeneralsurgery.com/essential-erythema-information-guide/