you have not mentioned age or gender and medications you have used so far to help your symptoms. First Hygiene of the areas involved keep them dry and free of sweat wear quality clothing not to irritate the skin if any infection treat under medical supervision identify triggers perfumes or creams or food spices and clothes that you may be using and avoiding them hydrate your body with drinking plenty of water through out the day take daily multivitamin and mineral supplements essential for skin rejuvenation Vitamin A D E especially use gentle coal tar based creams lotions Vitamin A, D and E creams and fish oil applied to affected areas there are several immunomodulator medicines cream based and oral and treatments with UV A and UV B LIGHT Therapy and Laser therapy that might help. based on which treatment you have tried and failed I can suggest what could be the next steps.