What are the subjective signs and symptoms of tetany?

Subjective Signs and Symptoms of Tetany

The subjective symptoms of tetany primarily include paresthesias (numbness and tingling) around the mouth (perioral), in the hands and feet, along with painful muscle cramps and a sensation of muscle stiffness.

Primary Subjective Symptoms

The key patient-reported symptoms include:

• Paresthesias: Numbness and tingling, particularly:

  • Circumoral (around the mouth) 1
  • Hands and feet 2, 3, 1
  • Fingers specifically 4

• Muscle cramps: Painful cramping sensations that patients describe as sharp or intense 5, 6, 3

• Muscle stiffness: Sensation of tightness or rigidity in muscles 2

• Pain: Localized pain, particularly in extremities (fingers, hands, feet) 7

Associated Subjective Complaints

Patients may also report:

• Anxiety: Often accompanies or precipitates tetany, particularly in hyperventilation-induced cases 4

• Respiratory distress: Sensation of difficulty breathing or shortness of breath 2

• Dysphagia: Difficulty swallowing (more common in older patients) 8

• Dysarthria: Difficulty speaking (can be an early subtle presentation) 8

Important Clinical Context

The subjective symptoms derive from neuromuscular hyperexcitability caused by hypocalcemia (ionized calcium <0.75 mmol/l), hypomagnesemia, or alkalosis 3, 1. The paresthesias and cramps represent the patient's perception of increased neuronal excitability at peripheral neuromuscular junctions 2.

Common Pitfall

Tetany can present with subtle, non-specific symptoms initially—particularly in older patients who may report bulbar symptoms like dysarthria or dysphagia before classic manifestations appear 8. Don't dismiss vague complaints of tingling or cramping, especially in patients with risk factors for electrolyte disturbances (renal failure, post-thyroid/parathyroid surgery, malabsorption disorders) 2, 1, 7.

Key Distinction

While carpopedal spasm, laryngospasm, and seizures are objective signs of tetany 3, the question asks specifically about subjective symptoms—what the patient experiences and reports. The sensory disturbances (paresthesias) and pain from muscle cramps are the primary subjective manifestations that bring patients to medical attention 3, 1.