If your skin turns red for a few minutes after applying moisturizer, it could indicate increased blood flow to the area. This is known as transient erythema, which is a temporary redness of the skin. It can occur for various reasons, such as the stimulation of blood vessels or the ingredients in the moisturizer. In many cases, this redness is harmless and subsides on its own. In any case, if the redness persists or is accompanied by other concerns, consult with a dermatologist for an evaluation and personalized treatment plan.