Ultraviolet rays in sunlight stimulate melanin production in the skin, triggering skin conditions like freckles that can affect your appearance. Medical beauty experts therefore label sunlight as the enemy of skin health, emphasizing that women should be especially cautious. Even in cold winter months, UV rays remain potent, so applying sunscreen before going outdoors is essential. Additionally, since sunscreen's effectiveness typically lasts only 2-3 hours, remember to reapply frequently!
Beyond UV exposure, numerous other factors contribute to skin darkening:
1. Excessive scrubbing during bathing
Some individuals vigorously rub their skin while bathing, believing it promotes cleaner skin. However, excessive force or repeated scrubbing can also cause skin darkening, known as "friction melanosis."The exact mechanism behind friction hyperpigmentation remains unclear, but experts confirm its link to improper scrubbing. It primarily results from mechanical stress like intense friction and pressure on localized skin, commonly seen in those who vigorously rub with bath towels or synthetic scrubbing cloths.It manifests as diffuse, net-like pigmentation ranging from light to dark brown, commonly appearing on bony prominences like the collarbone, ribs, shoulder blades, elbows, and knees.This occurs because these metals can directly or indirectly increase the quantity and activity of substances involved in melanin production, such as tyrosine, tyrosinase, and dopa decarboxylase. Key culprits include animal liver, kidney, oysters, shrimp, crab, legumes, walnuts, black sesame seeds, and raisins.