Idiopathic swelling of the lower lip associated with topical anaesthesia. Report of three cases.

Three cases of idiopathic swelling of the lower lip are presented. Each developed following administration of a topical anaesthetic agent with unusual clinical manifestations closely resembling allergic angio-oedema. The possibility of psychogenically mediated reactions was considered the contributing aetiological factor which showed as a somatic manifestation in the lower lips.