Hello doctors, I am of age 25 recently I facing some skin problems like my has become more itchy and dark near groin area I understood that it's because of sweat and not to worry but I scared when I had similar itching on my cheek and when I rubbed it I saw some dark circle was formed similar to my groin area and another was at my chest and shoulder it's worrying me as it can spread to other parts and it was not clearing. Please help me hope i'll get advice from you.