what is considered severe hypothyroidism
Hypothyroidism, or low thyroid and sometimes hypothyreosis, is a common disorder of the endocrine system in which the thyroid gland does not produce enough thyroid hormone.It can cause a number of symptoms, such as poor ability to tolerate cold, a feeling of tiredness, and weight gain.In children, hypothyroidism leads to delays in growth and intellectual development, which is called cretinism in severe cases.orldwide, too little iodine in the diet is the most common cause of hypothyroidism. In countries with enough iodine in the diet, the most common cause of hypothyroidism is the autoimmune condition Hashimoto's thyroiditis.