Hello I have had a discoloration on my stomach and back for years. I stay out of the sun and always wear sunscrean if I do go out. I am of mixed ethnicity (asian and white) and my skin is a medium tan color. the bloches do not itch, nor do they go away. I was diagnosed with eczema at a very young age, but this discoloration came about within the last few years. Is it something I should be concerned with?