The symptoms of abnormal TSH levels can vary depending on whether the child has hypothyroidism or hyperthyroidism:
Hypothyroidism: Symptoms may include fatigue, weight gain, constipation, dry skin, hair loss, cold intolerance, and slowed growth and development. Hyperthyroidism: Symptoms may include weight loss, increased appetite, rapid heartbeat, nervousness, irritability, sweating, and heat intolerance.
