Verapamil-induced erythermalgia.

Erythermalgia is a rare clinical syndrome characterised by intermittent, usually symmetrical burning pain, warmth and dermal erythema of the extremities with an amelioration of discomfort by cooling of the extremity. In this report, we describe a patient with erythermalgia caused by long-term verapamil use. After discontinuing the verapamil, the symptoms improved dramatically within two weeks.