While there is inherent harm in removing a normal, healthy, innervated and vascularized body part, the harms are not widely known.  Botched circumcisions are not often publicized.  These sources address circumcision harms that occur in males, as well as harms caused to females by circumcision, excision, and infibulation.

*Catholics Against Circumcision may not agree with everything stated at other websites linked to from here.