Newsletter Thyroid Disorders – Symptoms & Signs Hypothyroidism Hypothyroidism, also called underactive thyroid or low thyroid, is a disorder of the endocrine system in which the thyroid gland does not produce enough thyroid hormone. 7 Signs Bradycardia Cold extremities Dry skin and hair Periorbital puffiness Hoarse voice Bradykinesis, slow movements Delayed relaxation phase of ankle […]