Try coconut oil. It has many advantages and its multi purpose. Cheap and affordable as well. Most importantly its a natural remedy with no chemicals. I love it. I use it for my babies eczema, mosquitoe bites, diaper rash, not saying that it will cure, or heal it immediately. It may reduce the minimize the rash. You can buy it from Guardian. Most importantly to look out for organic, cold pressed extra virgin when purchasing. You can opt for other brands as well. I use Vita Coco Coconut oil $18.95. There are many other cheaper alternatives as well.
http://m.newhealthadvisor.com/Coconut-Oil-for-Babies.html
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Bad Mum, Kudos to that.