For sun-induced facial darkening, daily use of a broad-spectrum sunscreen (SPF 30+) is essential to prevent further pigmentation. You can apply topical creams containing Vitamin C, azelaic acid, or niacinamide to gently brighten the skin. For the delicate eye area, look for mild formulations containing hyaluronic acid or low-strength retinol. To reduce hand wrinkles, apply a retinoid cream (like retinol) at night to boost collagen, followed by a thick moisturizer containing ceramides or urea. Always protect your hands with sunscreen during the day. These common skin changes respond well to consistent care. Please consult a dermatologist for a personalized prescription plan.