Which of the following is a sign of hypocalcemia?

Numbness and tingling are classic signs of hypocalcemia, which is a condition characterized by low levels of calcium in the blood. Calcium is critical for many physiological functions, including nerve signal transmission and muscle contractions. When calcium levels drop, it can lead to increased neuromuscular excitability, resulting in symptoms such as numbness, tingling, or even muscle spasms in areas like the hands, feet, and face.

In contrast, the other options provided do not directly correlate with hypocalcemia. High blood pressure is typically not associated with low calcium levels; in fact, calcium plays a role in vascular function, and its deficiency might not cause hypertension. Excessive sweating is more indicative of other conditions, including hormonal imbalances or metabolic issues, rather than being specifically related to decreased calcium. Similarly, while a rapid heartbeat can occur due to various factors, it is not a specific sign of hypocalcemia. Understanding these relationships is crucial for recognizing hypocalcemia and its implications in clinical practice.