I have personal experience with this problem. My two youngest children developed my tendency toward eczema, even though they were breastfed. Atopic dermatitis, or eczema, is a skin disorder where the skin becomes red and itchy. In babies, eczema can begin around the age of two to six months, often starting out as a rosy rash on the cheeks. Facial eczema often goes away as mysteriously as it arrived when a child reaches the age of two or three.
Allergies are less common in exclusively breastfed babies.
Babies fed cow's milk were found to have seven times the incidence of eczema as breastfed babies. Though not all medical professionals agree with the results of these studies, eczema in the breastfed baby often does seem to be very much related to the mom's consumption of dairy products. With careful avoidance of all dairy products, it can still take quite some time until you would see improvement in dermatitis. Be sure to read all labels. While eating dairy-free, focus on other foods that you enjoy eating.