When a baby’s silky smooth skin develops red, dry, itchy patches, the culprit is often eczema. Commonly appearing around 2 to 6 months of age, eczema (or atopic dermatitis) affects some 20 percent of infants and young children. If your baby is itchy and irritated, these six trusty eczema treatments from readers are sure to help soothe his skin. 1.…