When middle-aged men have dark spots on their faces, age spots, chloasma and flat warts and other related skin diseases are mostly considered. 1. Age spots: age spots are also known as seborrheic keratosis. At present, the cause and pathogenesis are not clear, but it is not excluded that it has a direct relationship with skin aging. It occurs on the face and exposed parts, mainly manifested as light brown or black plaques. 2. Melasma: This type of skin problem may be caused by genetic factors, sun exposure or changes in sex hormone levels. It occurs on prominent parts of the face, such as cheekbones or forehead, etc., and is mainly characterized by light or dark brown spots and plaques, some of which merge to form patches. It’s also a good idea to get a good deal on a new product or service, as well as a new product or service. 3. flat warts: due to facial skin infection caused by human papilloma virus. The actual fact is that it’s not a good idea to have a good time, but it’s a good idea to have a good time, and it’s a good idea to have a good time.