Connell has tabulated the difficulties and dangers met with in this work as follows:
1. Toxic absorption.
2. Marked inflammatory reaction.
3. Loss of tissue, due to infection and abscess formation.
4. Pressure necrosis, caused by hyperinjection.
5. Sloughing of tissue as a result of the heat of paraffin.
6. Injection into very dense or inelastic structures, or where scar tissue is firmly attached to the underlying and adjacent parts.
7. Subinjection of too small an amount of paraffin with an insufficient correction of the deformity.
8. Hyperinjection with overcorrection of deformity.
9. Air embolism.