Many concerns respond gradually over a course of sessions rather than after a single treatment. As a general guide, pigmentation may require around 3–6 sessions, while acne scar concerns may require around 4–8 sessions, spaced several weeks apart. Tattoo removal may require additional sessions, depending on the tattoo size, colour, depth, and individual response. Melasma is usually managed as an ongoing condition, and recurrence can occur. Individual response varies based on skin type, concern, treatment plan, and aftercare. Daily sun protection and proper post-treatment care are important, and no specific outcome can be guaranteed. Before starting, ask the clinic to explain the estimated number of sessions, possible maintenance, and indicative total cost, not only the single-session price.