Dark marks on the cheeks for a long time are most commonly due to melasma or post-acne hyperpigmentation, which happens when the skin produces excess pigment, often triggered by sun exposure, hormones, or past acne inflammation. The most important part of treatment is not any single cream, but strict daily sun protection, because sunlight is the main reason these marks become darker or do not fade. Use a broad-spectrum sunscreen every morning (SPF 30-50) and reapply if you are outdoors. For creams, dermatologists usually suggest ingredients that gradually reduce pigmentation, such as azelaic acid, niacinamide, kojic acid, vitamin C, and tranexamic acid. These help lighten dark patches slowly and safely over weeks to months. In stubborn cases, doctors may prescribe stronger combination creams containing ingredients like hydroquinone or retinoids, but these should only be used under medical supervision because they can irritate the skin if misused. For face wash, choose a gentle, non-drying cleanser rather than harsh ?fairness? soaps. Mild cleansers with ingredients like salicylic acid (for acne-prone skin) or simple hydrating cleansers help keep the skin clean without worsening pigmentation. Avoid scrubbing, bleaching soaps, or strong home remedies, as they can make melasma worse. Along with creams, lifestyle care is important?avoid excessive sun exposure, use a hat or scarf outdoors, maintain a simple skincare routine, and be consistent for at least 2?3 months because pigmentation improves slowly. If the marks have been present for 2 years or are spreading, it is best to consult a dermatologist, as procedures like chemical peels or prescription treatment may be needed for better results.