The main cause of hypothyroid is when enough hormones are not produced by the thyroid gland and there is a chemical imbalance in the body. There can be enormous causes including hyperthyroidism treatments, thyroid surgery, autoimmune disease, radiation therapy and certain medications.
Hypothyroidism can be caused by factors like:
It is the most common cause of hypothyroidism also known as Hashimoto’s thyroiditis. This autoimmune disorder tends to occur when there is a production of antibiotics that attacks the tissues of the body. However, with the use of these antibiotics, the ability of the thyroid to produce hormones is affected.
Over-response to hypothyroidism:
When there is too much production of thyroid hormone, then the treatment is often done with radioactive iodine or anti-thyroid medications. This treatment is done to bring back the proper function of thyroid back to normal. But sometimes it can go totally opposite and ends up the production of hormone too much which results in permanent hypothyroidism.
Removal of the thyroid gland or a larger portion of it can stop or diminish the production of hormones. But in that case, the intake of thyroid hormones has to be done for life.
This therapy is used for the cancer treatments, which can affect your thyroid gland.
There are many medications that also tend to the growth of hypothyroidism. Medication used to treat certain psychiatric disorders like lithium can be another cause.