A baby with a lot of red rashes on the body and face is generally considered to be eczema. Eczema is usually caused by allergies, so you can send your baby to the hospital for allergen testing and instruct your baby to avoid contact with allergic substances. You can also parents usually pay more attention to care, may be able to observe what the baby is allergic to, to avoid contact. You can use topical creams or applications that are safe and non-irritating to your baby’s skin, such as vitamin E ointment, zinc oxide borate ointment, or glyburide lotion, and pay attention to keeping your skin dry, try not to heat up your baby, take as few baths as possible, and smear more emollient and anti-itch moisturizer.