What causes large dark spots on the face?

The causes of developing large dark patches on the face may involve multiple factors: 1. Genetic factors: A family history of similar conditions is a common cause of large dark patches appearing on the face. The likelihood of passing these traits to offspring is higher, especially when close relatives such as parents also have similar symptoms. 2. Post-inflammatory hyperpigmentation: Skin may develop pigmented patches following episodes of acute or chronic inflammation, and these dark patches may persist even after the inflammation subsides. 3. Melasma: Prolonged exposure to ultraviolet radiation or hormonal changes may be the main contributing factors to melasma, which presents as yellowish-brown or dark brown patches on the skin. 4. Other factors: Skin conditions such as seborrheic keratosis, nevus of Ota, and melanocytic nevi, as well as melanoma, fungal infections, and solar dermatitis, can also lead to the appearance of large dark patches on the face. Given the wide variety of causes for large dark patches on the face, individuals should visit a dermatology clinic for professional evaluation and diagnosis to determine the specific cause and appropriate treatment.