Cheek white lines can be caused by various factors, including skin dryness, sun exposure, aging, and poor nutrition. Additionally, this might be a manifestation of certain skin conditions, such as pityriasis alba, tinea versicolor, and atopic dermatitis. Skin Dryness Dry skin is a common issue, especially during the autumn and winter seasons when air humidity decreases, causing the body to lose moisture more quickly. If hydration is not promptly replenished, the skin can easily become dry, leading to fine lines and white lines. Sun Exposure Prolonged exposure to the sun can damage the skin, resulting in the appearance of fine... Learn more