What is a common sign of electrolyte imbalance?

Muscle weakness and soreness are common signs of electrolyte imbalance due to the critical role that electrolytes, such as sodium, potassium, calcium, and magnesium, play in muscle function and nerve conduction. An imbalance can disrupt normal electrical activity within muscles, leading to symptoms like weakness, cramps, and soreness. For example, low levels of potassium (hypokalemia) can cause muscle weakness, while elevated levels of calcium (hypercalcemia) may also lead to muscles feeling weak and achy.

The other options do not typically relate directly to electrolyte imbalances. Increased energy is not a common symptom; rather, imbalances often result in fatigue. While hyperactivity might occur in some specific situations such as hypernatremia, it isn't a general sign of imbalance. Dysphagia, or difficulty swallowing, is not specifically linked to electrolyte abnormalities but rather could arise from a variety of neuromuscular or structural issues. Therefore, muscle weakness and soreness offer a more direct indication of an electrolyte imbalance.