My 2 year old has had a rash / hives in her diaper area front and back chronically, but has been worsening over the last 6 weeks. She does have a dairy and egg white allergy, but it has been eliminated from her diet all together although she has had 2 very minor exposures. Now the rash is visible red raised welt-like hives that flare and we treat with Triamcinolone that was prescribed by her pediatrician. Should we be looking for another cause of the hives? Her diapers or pull ups? She has no other symptoms except she get s a small patch below her mouth and on her cheek at the same time.