Hello....  Corns in the foot are due to the abnormal distribution of the weight and hence build up of the extra skin...  Corn Excision surgeries usually don't go much deep and rarely require Stitches...  If the Stitches are removed and the surface has opened up its not an issue to worry...  It will heal on itself,  provided u are giving proper off-loading to the wound site.. There are variety of off-loading shoes available in case u want to ambulate..  Consult a podiatrist for further guidance.