This is one of the reason I stick to Huggies... Never had that problem with them. But yes, had that problem with dd when I was trying different nappies with her... You'll need to stop using the nappies if you want it to clear up.
l've actually seen an article very recently on facebook about a chemical burn from a nappy. Cannot remember the brand and l have a feeling it was in America, but the poor little bub had a perfectly round burn on her hip, exactly in the same spot and exactly the same shape as the round dot / print thingy on the nappy.
glad she is clearing up Unique - poor bubba sad
Mr J (April 2005) Miss Z (Feb 2007) and Miss O (Oct 2010)