Symptoms of an Overactive Thyroid 

Symptoms can vary greatly from one patient to the next, so not experiencing any of the following symptoms does not mean that the patient has a normally functioning thyroid. A doctor should perform a complete examination and may perform other tests to diagnose hyperthyroidism. 

Some possible symptoms of hyperthyroidism include: 

• goiter (enlarged thyroid gland);
• nervousness or irritability;
• hair loss;
• thinning skin;
• depression and anxiety;
• shakiness or tremors;
• rapid heartbeat;
• insatiable hunger;
• weight loss (even if eating more);
• diarrhea;
• fatigue;
• higher body temperature;
• rash;
• infertility; and
• more. 

This is far from a complete list. If you experience these symptoms or others that might indicate an overactive thyroid, speak with your doctor right away for proper evaluation and diagnosis.