When the thyroid produces less thyroid hormone, its metabolism slows down. This is known as hypothyroidism, myxoedema or useless thyroid. It is also known as Hashimoto's disease.
The main causes of ineffective thyroid are:
Hashimoto's Disease - Antibodies are an autoimmune disease that first triggers the thyroid and then destroys it.
Pituitary or hypothalamic failure can cause secondary hypothyroidism
Genetic Dysfunction - Congenital thyroid dysfunction or programmed to fail for some time in adult life a behaviour.
Environmental challenges or disorders - chemicals and certain foods and beverages can cause thyroid problems
Previous thyroid surgery or radioactive iodine therapy
Treatment for hyperthyroidism

In his opinion, thyroid deficiency is 20% to 50% of a standard population (20 - 50 out of every 100).
Click for more info: https://bit.ly/3d58AI6

Author's Bio: 

Radioactive thyroid and hypothyroidism treatment in Hyderabad. Our physicians specialized in the treatment of thyroid diseases with over 15+ years of experience.