Most children and babies who have an itchy scalp have eczema. Eczema makes the scalp dry and sensitive, and dry skin easily causes dandruff, so dandruff is also seen in children with scalp eczema. Back.. In babies, this condition is more common on the head.. When the child gets older, the symptoms of scalp eczema are usually limited to dandruff. The exact cause of scalp eczema in babies and children is not known, but many experts say that a combination of genetics, natural yeasts in the body, chemical stimuli such as shampoo or soap, and cold and dry air causes this disease. Babies, the hormones of the mother's body may cause eczema on the scalp. Symptoms of scalp eczema in babies