Symptoms of eczema can show up as red, crusty patches on your baby's skin, often during their first few months. This condition usually affects their cheeks and the joints of their arms and legs. To soothe eczema, a warm bath can help as it hydrates and cools the skin and itching. Just make sure the water is not too hot and keep the bath short, about 10 minutes. After the bath, don't rub skin dry with towel, pat dry instead.
This is a good read about the different for eczema for baby and toddlers. What to look out for. https://nationaleczema.org/eczema/child-eczema/infants-toddlers/