i have been struggling with excema on my daughter since she was about your sons age. some things i found helpful were cetephil(eucerine never really helped her) and shea butter(you will need to special order) shea butter has been a life saver, her feet were so bad that they were cracking and bleeding, now you would never know she had excema. i highly recomend shea, its an oil used in africa for dry cracking skin.