What is a common symptom of hypothyroidism?

Fatigue is a common symptom of hypothyroidism because an underactive thyroid gland leads to a decrease in the production of thyroid hormones, which play a crucial role in regulating the body's energy metabolism. When thyroid hormone levels are low, the body's metabolic processes slow down, resulting in feelings of tiredness and lethargy. Individuals may find that they struggle with everyday tasks because their energy levels are significantly reduced. This symptom often leads to a general sense of unwellness and can impact quality of life.

In contrast, symptoms such as unexplained weight loss and increased energy levels are typically associated with hyperthyroidism, where there is an overproduction of thyroid hormones. Excessive sweating, while it can occur in certain thyroid conditions, is more characteristic of hyperthyroidism as well. Thus, fatigue stands out as a primary manifestation of hypothyroidism due to the hormonal deficiency affecting energy production in the body.