What is a common symptom of hyperthyroidism?

Weight loss is a common symptom of hyperthyroidism due to the increased metabolic rate caused by excess thyroid hormones. In hyperthyroidism, the body's metabolism speeds up, leading to the burning of calories at a higher rate than normal. As a result, individuals often experience noticeable weight loss, even if their appetite may remain the same or even increase. This weight loss can occur regardless of diet and physical activity levels, making it a significant indicator of the condition.

In contrast, fatigue, cold intolerance, and dry skin are more commonly associated with hypothyroidism, where the metabolism slows down and can lead to weight gain rather than loss. Therefore, recognizing weight loss in conjunction with other symptoms can help in identifying hyperthyroidism effectively.