Inform clients that redness is a common side effect after treatments like waxing, chemical peels, or microdermabrasion. Redness typically subsides within a few hours to a couple of days. Advise clients to apply soothing products like aloe vera or cool compresses to reduce redness and avoid using harsh products that could aggravate the skin. Proper care for redness ensures a quicker recovery and more comfortable post-treatment experience.