Common Signs and Symptoms of Thyroid Imbalance A thyroid imbalance occurs when the thyroid gland produces either too much or too little of the hormones T3 (triiodothyronine) and T4 (thyroxine). These hormones are crucial for regulating metabolism , energy, mood, temperature, and even heart rate. When the thyroid is out of balance, it can lead to either hypothyroidism (underactive thyroid) or hyperthyroidism (overactive thyroid), each with its distinct symptoms. Common Signs of Hypothyroidism (Underactive Thyroid): This condition happens when the thyroid doesn’t produce enough hormones. It slows down body functions and is more common in women. Symptoms include: Fatigue and sluggishness – constant tiredness even after rest Weight gain – unexplained increase in weight despite no change in diet Cold sensitivity – feeling cold more often Dry skin and brittle hair – due to slowed cell regeneration Constipation – slowed digestive processes Depression or low mood – thyroid hormones af...