I have a 7year old grandson with a rash that comes and goes, very itchy , covering most of body. Also has swollen lymph nodes in neck, arm pits, And groin. Doctors and allergists cannot seem to agree on anything. He is not hurting,yet the rash and swollen nodes are very troubling g to us. Has been tested for cancer , also a skin biopsy which showed not much of anything. Allergists cannot figure it out so far. Any suggestions as to where to turn?