Sam Ellis, MD, a board-certified dermatologist, shares 10 skincare mistakes she would never make again, aiming to educate viewers on better practices. She highlights avoiding intense pulsed light (IPL) treatments due to their adverse effects on melasma, steering clear of harsh scrubs, not using DIY skincare, and not relying on powder sunscreens. She also discusses using whole-face acne treatments rather than spot treatments, avoiding feminine hygiene washes, and never mixing sunscreens with other products. Other tips include keeping sunscreen out of the car, avoiding prolonged heating pad use, and skipping sunbathing to prevent skin damage.