喂什么米糊?rice cereal还是 barley cereal( ?Gluten intolerance).

"从满月后有非常严重的湿疹..." 这么久了，baby的儿科医生没有任何指导吗？
先停喂辅食,情况好转时再一项一项加，每次同种的喂三、四天以上。看是哪种辅食引起的？
若你自己找不出原因，最好看儿科医生.He/She may refer you to a pediatric allergist for a skin test or blood work to tell you which food or foods are causing the problem and whether the symptoms are part of an immune reaction (indicating an allergy) or are a sign that your baby's unable to digest the food (indicating a food intolerance).

查一查别的原因:洗衣水与婴儿皂(Use soap such as Cetaphil Gentle Skin Cleanser that has no perfumes. no almond oil. Use lotion such as Eucerin that has no perfumes.)、衣服（要全棉）、枕头和其它床上用品、婴儿玩具（stuffed animals）、有无宠物、你用的化妆品（香水、lotion...)、你穿的衣服等等...

一般来说，What foods might my baby be allergic to?

It's possible to be allergic to any food, but these eight food groups are responsible for 90 percent of food allergies: eggs, milk, peanuts, wheat, soy, tree nuts (like walnuts, Brazil nuts, and cashews), fish (such as tuna, salmon, and cod), and shellfish (like lobster, shrimp, and crab).

辛苦了，宝宝的妈妈！take good care of yourself as well.
Good luck!