23 Symptoms That Could Indicate Hyperthyroidism
17. Increased Frequency of Urination

Hyperthyroidism can speed up every system in the body—including the kidneys. This can lead to more frequent urination, especially at night. While it’s easy to blame this symptom on hydration or aging, increased urine output (sometimes coupled with a heightened thirst) may signal a hormonal imbalance. In more severe cases, this can contribute to dehydration, fatigue, and electrolyte imbalances—especially if you're also sweating excessively.