this type of skin rash which comes and goes is most consistent with infantile eczema , which is usually on the face of the child , can be itchy and sometimes not , white to red rash once exposed to heat. some of these eczema can be manageable but some of them may persist up to one year . I recommend you to do the following : - avoid chemical detergents as possible, upon bathing try to use the herbal soaps which contains olive oil. - keep the skin moisturized and avoid dryness, because sometimes the skin cracks and start to bleed a little bit - if you are not breastfeeding her , try to , and cut down cow s milk , if she develops symptoms like constipation or diarrhoea , vomiting and little weight gain then shift to hypoallergic formulas . - avoid using steroid creams for longer period of times because it thins the skin . I hope this helps