My 17 month old rarely gets nappy rashes but whenever he is ill he gets diarrhea which gives him a really bad nappy rash. Today it is so bad that it looks like a burn and the skin has broken and the broken areas look shiny like it is going to weep. I usually put Sudocream (Antiseptic Healing Cream) on but it doesn't seem to help. It's a weekend so I can't go and see a doctor until tomorrow. Any suggestions anyone?