My three girls are all like you, have many rash all over the body, for a long period of time, talking over then two years. I tried many things but it turns out this one is the best. It is sold in SASA and it a spray. It is made with vineager and chocoal. You can just ask them. It costs about $60. I used it on my girls and within one week the rash is gone. Hope it works with you also.