Ktp lasers can improve facial redness by inflamming the inside of the capillary blood vessels and the body the digests the vessel over a few weeks. Subsequent treratments are often needed with either the KTP or V-beam lasers.
KTP laser is not a usual one that is used for skin resurfacing. I usually use a Fractionated CO2 laser. The recovery time to be presentable varies from about one to two weeks. KTP is good for deeper vascular lesions and the healing occurs usually over about one week.