In irritant contact dermatitis there is skin irritation, including inflammation, swelling of the
area, and warmth. The rash will be confined to the specific
area that came into contact with the offending agent.Eczema is a common disorder in infants and is associated with dry and itchy patches of skin.
I sincerely advise you to consult a dermatologist/pediatric dermatologist and discuss these possibilities with him.Pls don,t apply anything without consulting as it may aggravate the condition.