What is the cause of chin long spots?

Mandible spots, the causes of a variety of women if suspected by gynecological diseases, should go to gynecology for detailed examination, and need to be diagnosed according to different gender and age. Young middle-aged women such as chloasma, pregnancy spots and liver spots, mainly and endocrine, sun exposure, emotional stress, stay up late and so on. In addition to congenital genetic including coffee spots, freckles, freckles, moles, etc., need to be treated according to their causes and diagnosis using different methods.