You can shower and wash your face normally after treatment. Be careful to use gentle cleansers and moisturizers that won't irritate your skin in the days immediately following laser resurfacing. Refrain from using any exfoliants or products with harsh ingredients, including retinol, for about a week.
Sun protection is also key after Fraxel treatment. Wear a sunscreen with an SPF of at least 30 whenever going outdoors, and avoid direct sun exposure whenever possible for approximately one week.