endocrine and metabolic disorders
Hypomagnesemia
Symptoms and Signs of Hypomagnesemia
Some patients are asymptomatic. Clinical manifestations include anorexia, nausea, vomiting, lethargy, weakness, personality change, tetany (eg, positive Trousseau or Chvostek sign or spontaneous carpopedal spasm, hyperreflexia), tremor, and muscle fasciculations. Trousseau signis the precipitation of carpal spasm by reduction of the blood supply to the hand with a tourniquet or blood pressure cuff inflated to 20 mm Hg above systolic blood pressure applied to the forearm for 3 minutes. Chvostek signis an involuntary twitching of the facial muscles elicited by a light tapping of the facial nerve just anterior to the exterior auditory meatus. The neurologic signs, particularly tetany, correlate with development of concomitant Hypocalcemia , Severe hypomagnesemia may cause generalized tonic-clonic seizures, especially in children. 