| A rare genetic peripheral neuropathy characterized by recurrent, stereotyped, episodic intense pain, occurring predominantly in either the upper body or lower limbs in several members of a family, which is triggered or exacerbated by fatigue, cold exposure, fasting, weather changes and/or physical stress or exertion and may or may not diminish with age. Sweating and other manifestations, such as tachycardia, breathing difficulties and generalized pallor, may be associated. |
