Hi, Thanks fr writing to us. From the description it seems you could be having fungal infection or eczema or psorasis or para psoriasis. It would ve difficult to think of the most plausible diagnosis without examining the lesion. Please visit a qualified dermatologist for proper clinical evaluation and if required a skin biopsy can be done. You can also use a premium service of this website to upload images of concerned area, reports and prescription provided by previous doctors and providing us with a detailed description to help you in a better way.