Suggest Treatment For Corn In Kids Feet

My child is 6 years. one her left feet, there is a corn. we had used corm removal strip as advised by docotr-5 strips. it was reduced and as advised by doctor we were having Septlin for the treatment. the intensity was reduced. then we relocated from dubai to now thailand. noticed the corn is increased bit more. please suggest what to do. thanks. YYYY@YYYY