In the auricular points group , the magnetic-ball sticking therapy was applied to subcortex ( pizhixia , AT4 ) , brainstem ( naogan , AT ( 3,4 i ) ) , mouth ( kou , CO1 ) , cheek ( mianjia , LO ( 5,6 i ) ) , tongue ( she , LO2 ) and throat ( yanhou , TG3 ) on one ear each time , and were changed on the other ear once every 3 days .