Hello dear, Thank you for your contact to health care magic. I read and understand your concern. I am Dr Arun Tank answering your concern. The pigmentation that arises after the jock itch is because of the after reaction of the melanin. As such there is no such cure for this condition. Only wait and watch can cure such a problem. Our immune system can gradually digest the extra pigments. But this process is very slow. If you want fast result than you can apply vitamin A, poly unsaturated fatty acid zinc etc. Various combination of the above product is available in the market and can be taken under your doctors guidance. Please do not expose the part to the direct sun light, avoid extra sweats to the parts and wear the cotton cloth that can absorbs the sweat. This much care can bring the change. I will be happy to answer your further concern on bit.ly/DrArun. Thank you, Dr Arun Tank Infectious diseases specialist, HCM.