The phrase "flaky patches" refers to areas where something, like skin or paint, has become dry, cracked, and easily falling off in small pieces. Full definition
Dead skin cells remain in place, and as they build up, the white flaky patches of skin which everybody fears slowly appear. (supernaturalacnetreatment.com)
Overall I would say I have combination to oily skin but that doesn't stop me from getting dry flaky patches during the winter months. (northwestblonde.com)
If your skin feels dry after cleansing, or you start to notice flaky patches, opt for a cleanser that's formulated for gentle or sensitive skin. (garnierusa.com)