ICD-11 definition : Primary Erythromelalgia is characterized by intermittent burning pain, redness and
warmth in the distal hands and feet. The primary form is often familial and inherited
in an autosomal dominant fashion. Some patients have gain of function mutations in
the SCN9A gene which encodes a voltage gated sodium channel ?-subunit, Nav 1.7.;
Primary Erythromelalgia is characterized by intermittent burning pain, redness and
warmth in the distal hands and feet. The primary form is often familial and inherited
in an autosomal dominant fashion. Some patients have gain of function mutations in
the SCN9A gene which encodes a voltage gated sodium channel ?-subunit, Nav 1.7.